Add new configs for OSS-Fuzz build

[abcSup]

This PR integrates existing fuzzers to OSS-Fuzz infrastructure for continuous fuzzing.

I made changes to the GN configs to allow the fuzzers build to easily use compiler and linker flags provided by the OSS-Fuzz. Therefore, to build fuzzers for OSS-Fuzz, we only have to enable the the oss_fuzz global config.

For testing, we can build all targets defined by the chip_fuzz_target rule for OSS-Fuzz with the following commands:

gn gen out/fuzz_targets --args="is_clang=true oss_fuzz=true"
ninja -C out/fuzz_targets fuzz_tests

[CLAassistant]

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[github-actions]

PR #26010: Size comparison from 1d73d5c to 03d8119

Full report (1 build for cc32xx)

platform	target	config	section	1d73d5c	03d8119	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	642745	642745	0	0.0
			(read/write)	203848	203848	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197248	197248	0	0.0
			.comment	194	194	0	0.0
			.data	1480	1480	0	0.0
			.debug_abbrev	933119	933119	0	0.0
			.debug_aranges	87608	87608	0	0.0
			.debug_frame	301328	301328	0	0.0
			.debug_info	20302991	20302991	0	0.0
			.debug_line	2679759	2679759	0	0.0
			.debug_loc	2824679	2824679	0	0.0
			.debug_ranges	286200	286200	0	0.0
			.debug_str	3039406	3039406	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	104289	104289	0	0.0
			.shstrtab	232	232	0	0.0
			.stab	204	204	0	0.0
			.stabstr	441	441	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	377422	377422	0	0.0
			.symtab	256768	256768	0	0.0
			.text	536336	536336	0	0.0

[github-actions]

PR #26010: Size comparison from fb13051 to df5f965

Increases (1 build for cc32xx)

platform	target	config	section	fb130517	df5f965	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL	.debug_info	20303341	20303342	1	0.0

Full report (1 build for cc32xx)

platform	target	config	section	fb130517	df5f965	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	642945	642945	0	0.0
			(read/write)	203848	203848	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197248	197248	0	0.0
			.comment	194	194	0	0.0
			.data	1480	1480	0	0.0
			.debug_abbrev	933129	933129	0	0.0
			.debug_aranges	87616	87616	0	0.0
			.debug_frame	301352	301352	0	0.0
			.debug_info	20303341	20303342	1	0.0
			.debug_line	2679963	2679963	0	0.0
			.debug_loc	2824782	2824782	0	0.0
			.debug_ranges	286208	286208	0	0.0
			.debug_str	3039557	3039557	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	104353	104353	0	0.0
			.shstrtab	232	232	0	0.0
			.stab	204	204	0	0.0
			.stabstr	441	441	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	377533	377533	0	0.0
			.symtab	256800	256800	0	0.0
			.text	536472	536472	0	0.0