Fix Disconnect RPC for ESP 32

[tehampson]

This fixes Disconnect RPC, by actually clearing the wifi station provision. Without this the device simply reconnects to wifi after disconnection.

Additionally PR #26180 added assert on the task ownership of the chip Stack lock on some SystemLayer timer calls. This PR fix the assert on SystemLayer().ScheduleWork call by acquiring the chipStack Lock before the call

Test:

• rpcs.chip.rpc.WiFi.Connect(ssid=b'<omitted>', security_type=0, secret=b'<omitted>' // Confirmed we connected to specified AP
• rpcs.chip.rpc.WiFi.Disconnect() // Confirmed that this disconnected properly from the AP

[github-actions]

PR #26231: Size comparison from 6025455 to a77e49a

Increases (1 build for cc32xx)

platform	target	config	section	6025455	a77e49a	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL	.debug_info	19489249	19489251	2	0.0

Full report (3 builds for cc32xx, qpg)

platform	target	config	section	6025455	a77e49a	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	601114	601114	0	0.0
			(read/write)	204132	204132	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197544	197544	0	0.0
			.comment	206	206	0	0.0
			.data	1468	1468	0	0.0
			.debug_abbrev	956756	956756	0	0.0
			.debug_aranges	103416	103416	0	0.0
			.debug_frame	349704	349704	0	0.0
			.debug_info	19489249	19489251	2	0.0
			.debug_line	2678035	2678035	0	0.0
			.debug_line_str	513	513	0	0.0
			.debug_loc	33340	33340	0	0.0
			.debug_loclists	1501882	1501882	0	0.0
			.debug_ranges	4984	4984	0	0.0
			.debug_rnglists	96008	96008	0	0.0
			.debug_str	3024877	3024877	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	104170	104170	0	0.0
			.shstrtab	265	265	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	477531	477531	0	0.0
			.symtab	285936	285936	0	0.0
			.text	494824	494824	0	0.0
qpg	lighting-app	qpg6105+debug	(read/write)	1163968	1163968	0	0.0
			.bss	99616	99616	0	0.0
			.data	856	856	0	0.0
			.text	611068	611068	0	0.0
	lock-app	qpg6105+debug	(read/write)	1133328	1133328	0	0.0
			.bss	94768	94768	0	0.0
			.data	852	852	0	0.0
			.text	580424	580424	0	0.0