Use a random discriminator for test runs.

[bzbarsky-apple]

If we're getting cross-talk, maybe this will help.

Problem

All of our test instances use the same onboarding info, so if we are in fact getting cross-talk the chip-tool of one test can end up talking to the all-clusters-app of a different test.

Change overview

Try using a randomly generated discriminator to work around that potential problem.

The switch from qrcode to onnetwork-long is to avoid needing to parse the QR code out from the all-clusters-app log, since it would no longer be constant.

Testing

Ran test locally and things worked.

[github-actions]

PR #12449: Size comparison from 6f3b5a0 to 0962785

Increases (5 builds for linux)

platform	target	config	section	6f3b5a0	0962785	change	% change
linux	all-clusters-app	debug	(read only)	1795353	1795545	192	0.0
			.rodata	145717	145781	64	0.0
			.text	1509394	1509522	128	0.0
	lighting-app	debug+rpc	(read only)	1649161	1649321	160	0.0
			.rodata	138449	138481	32	0.0
			.text	1372130	1372258	128	0.0
	ota-provider-app	debug	(read only)	1325977	1326169	192	0.0
			.rodata	120168	120232	64	0.1
			.text	1104738	1104866	128	0.0
	ota-requestor-app	debug	(read only)	1426049	1426241	192	0.0
			.rodata	132080	132144	64	0.0
			.text	1189458	1189586	128	0.0
	tv-app	debug	(read only)	1942337	1942529	192	0.0
			.rodata	167976	168040	64	0.0
			.text	1625202	1625330	128	0.0

Full report (39 builds for efr32, esp32, k32w, linux, mbed, nrfconnect, p6, qpg, telink)

platform	target	config	section	6f3b5a0	0962785	change	% change
efr32	lighting-app	BRD4161A	(read only)	729232	729232	0	0.0
			(read/write)	119580	119580	0	0.0
			.bss	117764	117764	0	0.0
			.data	1812	1812	0	0.0
			.text	729224	729224	0	0.0
		BRD4161A+rpc	(read only)	757872	757872	0	0.0
			(read/write)	137884	137884	0	0.0
			.bss	135964	135964	0	0.0
			.data	1920	1920	0	0.0
			.text	757864	757864	0	0.0
	lock-app	BRD4161A	(read only)	703076	703076	0	0.0
			(read/write)	117284	117284	0	0.0
			.bss	115516	115516	0	0.0
			.data	1768	1768	0	0.0
			.text	703068	703068	0	0.0
	window-app	BRD4161A	(read only)	706204	706204	0	0.0
			(read/write)	117708	117708	0	0.0
			.bss	115932	115932	0	0.0
			.data	1776	1776	0	0.0
			.text	706196	706196	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	839056	839056	0	0.0
			(read/write)	1224850	1224850	0	0.0
			.dram0.bss	58720	58720	0	0.0
			.dram0.data	14028	14028	0	0.0
			.flash.rodata	166856	166856	0	0.0
			.flash.text	839056	839056	0	0.0
			.iram0.text	61394	61394	0	0.0
		m5stack	(read only)	910499	910499	0	0.0
			(read/write)	424096	424096	0	0.0
			.dram0.bss	64120	64120	0	0.0
			.dram0.data	34000	34000	0	0.0
			.flash.rodata	194696	194696	0	0.0
			.flash.text	905115	905115	0	0.0
			.iram0.text	122943	122943	0	0.0
k32w	lighting-app	k32w061+se05x+release	(read/write)	726728	726728	0	0.0
			.bss	78956	78956	0	0.0
			.data	1844	1844	0	0.0
			.text	640128	640128	0	0.0
	lock-app	k32w061+debug	(read/write)	615732	615732	0	0.0
			.bss	69396	69396	0	0.0
			.data	1808	1808	0	0.0
			.text	538728	538728	0	0.0
	shell	k32w061+debug	(read/write)	681536	681536	0	0.0
			.bss	80996	80996	0	0.0
			.data	1780	1780	0	0.0
			.text	592960	592960	0	0.0
linux	all-clusters-app	debug	(read only)	1795353	1795545	192	0.0
			(read/write)	125800	125800	0	0.0
			.bss	53360	53360	0	0.0
			.data	1104	1104	0	0.0
			.data.rel.ro	66032	66032	0	0.0
			.dynamic	592	592	0	0.0
			.got	4112	4112	0	0.0
			.init	27	27	0	0.0
			.init_array	560	560	0	0.0
			.rodata	145717	145781	64	0.0
			.text	1509394	1509522	128	0.0
	bridge-app	debug+rpc	(read only)	1365325	1365325	0	0.0
			(read/write)	71888	71888	0	0.0
			.bss	35408	35408	0	0.0
			.data	1680	1680	0	0.0
			.data.rel.ro	29792	29792	0	0.0
			.dynamic	592	592	0	0.0
			.got	3984	3984	0	0.0
			.init	27	27	0	0.0
			.init_array	408	408	0	0.0
			.rodata	118756	118756	0	0.0
			.text	1145733	1145733	0	0.0
	chip-tool	debug	(read only)	6435173	6435173	0	0.0
			(read/write)	198512	198512	0	0.0
			.bss	33704	33704	0	0.0
			.data	1008	1008	0	0.0
			.data.rel.ro	158216	158216	0	0.0
			.dynamic	592	592	0	0.0
			.got	4472	4472	0	0.0
			.init	27	27	0	0.0
			.init_array	480	480	0	0.0
			.rodata	301208	301208	0	0.0
			.text	5730133	5730133	0	0.0
	lighting-app	debug+rpc	(read only)	1649161	1649321	160	0.0
			(read/write)	104944	104944	0	0.0
			.bss	41072	41072	0	0.0
			.data	1264	1264	0	0.0
			.data.rel.ro	57296	57296	0	0.0
			.dynamic	608	608	0	0.0
			.got	4136	4136	0	0.0
			.init	27	27	0	0.0
			.init_array	536	536	0	0.0
			.rodata	138449	138481	32	0.0
			.text	1372130	1372258	128	0.0
	ota-provider-app	debug	(read only)	1325977	1326169	192	0.0
			(read/write)	70344	70344	0	0.0
			.bss	37984	37984	0	0.0
			.data	912	912	0	0.0
			.data.rel.ro	26328	26328	0	0.0
			.dynamic	592	592	0	0.0
			.got	4048	4048	0	0.0
			.init	27	27	0	0.0
			.init_array	448	448	0	0.0
			.rodata	120168	120232	64	0.1
			.text	1104738	1104866	128	0.0
	ota-requestor-app	debug	(read only)	1426049	1426241	192	0.0
			(read/write)	74240	74240	0	0.0
			.bss	40096	40096	0	0.0
			.data	976	976	0	0.0
			.data.rel.ro	28040	28040	0	0.0
			.dynamic	592	592	0	0.0
			.got	4032	4032	0	0.0
			.init	27	27	0	0.0
			.init_array	472	472	0	0.0
			.rodata	132080	132144	64	0.0
			.text	1189458	1189586	128	0.0
	shell	debug	(read only)	814361	814361	0	0.0
			(read/write)	60232	60232	0	0.0
			.bss	16872	16872	0	0.0
			.data	240	240	0	0.0
			.data.rel.ro	38656	38656	0	0.0
			.dynamic	592	592	0	0.0
			.got	3504	3504	0	0.0
			.init	27	27	0	0.0
			.init_array	344	344	0	0.0
			.rodata	83538	83538	0	0.0
			.text	624738	624738	0	0.0
	tv-app	debug	(read only)	1942337	1942529	192	0.0
			(read/write)	314608	314608	0	0.0
			.bss	245464	245464	0	0.0
			.data	1504	1504	0	0.0
			.data.rel.ro	61984	61984	0	0.0
			.dynamic	592	592	0	0.0
			.got	4424	4424	0	0.0
			.init	27	27	0	0.0
			.init_array	624	624	0	0.0
			.rodata	167976	168040	64	0.0
			.text	1625202	1625330	128	0.0
mbed	all-clusters-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2298624	2298624	0	0.0
			.bss	181788	181788	0	0.0
			.data	5168	5168	0	0.0
			.heap	849488	849488	0	0.0
			.text	1261224	1261224	0	0.0
	lighting-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2283376	2283376	0	0.0
			.bss	172816	172816	0	0.0
			.data	5480	5480	0	0.0
			.heap	858152	858152	0	0.0
			.text	1245976	1245976	0	0.0
	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2256408	2256408	0	0.0
			.bss	171632	171632	0	0.0
			.data	5480	5480	0	0.0
			.heap	859336	859336	0	0.0
			.text	1219008	1219008	0	0.0
	pigweed-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	1140008	1140008	0	0.0
			.bss	11756	11756	0	0.0
			.data	4376	4376	0	0.0
			.heap	1020312	1020312	0	0.0
			.text	103392	103392	0	0.0
	shell	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2046056	2046056	0	0.0
			.bss	156624	156624	0	0.0
			.data	4864	4864	0	0.0
			.heap	874960	874960	0	0.0
			.text	1008656	1008656	0	0.0
nrfconnect	lighting-app	nrf52840dk_nrf52840	(read/write)	878863	878863	0	0.0
			bss	113316	113316	0	0.0
			rodata	97968	97968	0	0.0
			text	592020	592020	0	0.0
		nrf52840dk_nrf52840+rpc	(read/write)	841311	841311	0	0.0
			bss	109664	109664	0	0.0
			rodata	89328	89328	0	0.0
			text	566120	566120	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	803846	803846	0	0.0
			bss	114688	114688	0	0.0
			rodata	93224	93224	0	0.0
			text	521472	521472	0	0.0
	lock-app	nrf52840dk_nrf52840	(read/write)	849687	849687	0	0.0
			bss	110352	110352	0	0.0
			rodata	93704	93704	0	0.0
			text	570268	570268	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	774942	774942	0	0.0
			bss	111764	111764	0	0.0
			rodata	88992	88992	0	0.0
			text	499812	499812	0	0.0
	pigweed-app	nrf52840dk_nrf52840	(read/write)	497463	497463	0	0.0
			bss	51820	51820	0	0.0
			rodata	45852	45852	0	0.0
			text	339492	339492	0	0.0
	pump-app	nrf52840dk_nrf52840	(read/write)	855683	855683	0	0.0
			bss	110488	110488	0	0.0
			rodata	95436	95436	0	0.0
			text	574332	574332	0	0.0
	pump-controller-app	nrf52840dk_nrf52840	(read/write)	848767	848767	0	0.0
			bss	110368	110368	0	0.0
			rodata	93576	93576	0	0.0
			text	569392	569392	0	0.0
	shell	nrf52840dk_nrf52840	(read/write)	779359	779359	0	0.0
			bss	109616	109616	0	0.0
			rodata	73284	73284	0	0.0
			text	521952	521952	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	694406	694406	0	0.0
			bss	110600	110600	0	0.0
			rodata	67928	67928	0	0.0
			text	442560	442560	0	0.0
p6	all-clusters-app	default	(read/write)	2320400	2320400	0	0.0
			.bss	109872	109872	0	0.0
			.data	2464	2464	0	0.0
			.heap	921008	921008	0	0.0
			.text	1278664	1278664	0	0.0
	light-app	default	(read/write)	2256112	2256112	0	0.0
			.bss	97936	97936	0	0.0
			.data	2328	2328	0	0.0
			.heap	933080	933080	0	0.0
			.text	1214376	1214376	0	0.0
	lock-app	default	(read/write)	2231472	2231472	0	0.0
			.bss	96592	96592	0	0.0
			.data	2288	2288	0	0.0
			.heap	934464	934464	0	0.0
			.text	1189736	1189736	0	0.0
qpg	lighting-app	qpg6100+debug	(read only)	498612	498612	0	0.0
			(read/write)	114144	114144	0	0.0
			.bss	79848	79848	0	0.0
			.data	944	944	0	0.0
			.text	493292	493292	0	0.0
	lock-app	qpg6100+debug	(read only)	471216	471216	0	0.0
			(read/write)	114144	114144	0	0.0
			.bss	78760	78760	0	0.0
			.data	896	896	0	0.0
			.text	465896	465896	0	0.0
	persistent-storage-app	qpg6100+debug	(read only)	108208	108208	0	0.0
			(read/write)	114140	114140	0	0.0
			.bss	36696	36696	0	0.0
			.data	292	292	0	0.0
			.text	102888	102888	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	780882	780882	0	0.0
			bss	79896	79896	0	0.0
			noinit	37160	37160	0	0.0
			text	542870	542870	0	0.0