[Silabs]Removed ipv4 flag from example build gn files and added in siw917 sdk

[Thirsrin]

Added:
Removed ipv4 flag from example build gn files and added in siw917 sdk gn file

Tested:
All app builds successfully done for 917 soc

[github-actions]

PR #25675: Size comparison from c1810b6 to 615be24

Decreases (1 build for qpg)

platform	target	config	section	c1810b6	615be24	change	% change
qpg	lock-app	qpg6105+debug	(read/write)	1120300	1120292	-8	-0.0
			.text	567400	567392	-8	-0.0

Full report (4 builds for cc32xx, mbed, qpg)

platform	target	config	section	c1810b6	615be24	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	645489	645489	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	930293	930293	0	0.0
			.debug_aranges	87384	87384	0	0.0
			.debug_frame	300248	300248	0	0.0
			.debug_info	20245969	20245969	0	0.0
			.debug_line	2660979	2660979	0	0.0
			.debug_loc	2804911	2804911	0	0.0
			.debug_ranges	283168	283168	0	0.0
			.debug_str	3026947	3026947	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	106009	106009	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	380271	380271	0	0.0
			.symtab	257312	257312	0	0.0
			.text	537360	537360	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2468312	2468312	0	0.0
			.bss	215964	215964	0	0.0
			.data	5880	5880	0	0.0
			.text	1430956	1430956	0	0.0
qpg	lighting-app	qpg6105+debug	(read/write)	1153444	1153444	0	0.0
			.bss	100076	100076	0	0.0
			.data	852	852	0	0.0
			.text	600540	600540	0	0.0
	lock-app	qpg6105+debug	(read/write)	1120300	1120292	-8	-0.0
			.bss	96468	96468	0	0.0
			.data	864	864	0	0.0
			.text	567400	567392	-8	-0.0

[jmartinez-silabs]

I fixed the build that was failing yesterday with #25670 but this is of course better. I am just still expecting a siwx917 general build file cleanup which will move a bunch of stuff around also.