Disable the watchdog in QEMU builds.

[andy31415]

Problem

The watchdog triggers during crypto tests (long running, full CPU tests)
and the warnings it shows both look scary and are not really actionable.
We know those tests take a long time, especially in emulation.

Change overview

Disable the watchdog when compiling for qemu.

Testing

Locally ran crypto tests and saw no more watchdog complains. CI should also show this.

[github-actions]

PR #13103: Size comparison from 2ddefed to 261923f

Full report (31 builds for efr32, esp32, k32w, linux, mbed, nrfconnect, p6, qpg, telink)

platform	target	config	section	2ddefed	261923f	change	% change
efr32	lighting-app	BRD4161A	(read only)	829456	829456	0	0.0
			(read/write)	127352	127352	0	0.0
			.bss	125472	125472	0	0.0
			.data	1876	1876	0	0.0
			.text	829448	829448	0	0.0
		BRD4161A+rpc	(read only)	817100	817100	0	0.0
			(read/write)	144016	144016	0	0.0
			.bss	142040	142040	0	0.0
			.data	1976	1976	0	0.0
			.text	817092	817092	0	0.0
	window-app	BRD4161A	(read only)	802864	802864	0	0.0
			(read/write)	126288	126288	0	0.0
			.bss	124456	124456	0	0.0
			.data	1832	1832	0	0.0
			.text	802856	802856	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	877066	877066	0	0.0
			(read/write)	1313042	1313042	0	0.0
			.dram0.bss	69784	69784	0	0.0
			.dram0.data	14220	14220	0	0.0
			.flash.rodata	175976	175976	0	0.0
			.flash.text	877066	877066	0	0.0
			.iram0.text	62254	62254	0	0.0
		m5stack	(read only)	937963	937963	0	0.0
			(read/write)	442144	442144	0	0.0
			.dram0.bss	74280	74280	0	0.0
			.dram0.data	34056	34056	0	0.0
			.flash.rodata	202800	202800	0	0.0
			.flash.text	932579	932579	0	0.0
			.iram0.text	122671	122671	0	0.0
k32w	light	k32w061+release	(read/write)	648328	648328	0	0.0
			.bss	76480	76480	0	0.0
			.data	1904	1904	0	0.0
			.text	564144	564144	0	0.0
	lock	k32w061+release	(read/write)	633044	633044	0	0.0
			.bss	76200	76200	0	0.0
			.data	1860	1860	0	0.0
			.text	549184	549184	0	0.0
linux	chip-tool-ipv6only	arm64	(read only)	6931292	6931292	0	0.0
			(read/write)	323633	323633	0	0.0
			.bss	54577	54577	0	0.0
			.data	1096	1096	0	0.0
			.data.rel.ro	208096	208096	0	0.0
			.dynamic	560	560	0	0.0
			.got	56160	56160	0	0.0
			.init	24	24	0	0.0
			.init_array	168	168	0	0.0
			.rodata	379476	379476	0	0.0
			.text	5864244	5864244	0	0.0
	thermostat-no-ble	arm64	(read only)	1994292	1994292	0	0.0
			(read/write)	143937	143937	0	0.0
			.bss	64321	64321	0	0.0
			.data	880	880	0	0.0
			.data.rel.ro	72000	72000	0	0.0
			.dynamic	560	560	0	0.0
			.got	3840	3840	0	0.0
			.init	24	24	0	0.0
			.init_array	288	288	0	0.0
			.rodata	128196	128196	0	0.0
			.text	1654624	1654624	0	0.0
mbed	all-clusters-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2334104	2334104	0	0.0
			.bss	189068	189068	0	0.0
			.data	5264	5264	0	0.0
			.text	1296680	1296680	0	0.0
	lighting-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2328616	2328616	0	0.0
			.bss	180896	180896	0	0.0
			.data	5544	5544	0	0.0
			.text	1291216	1291216	0	0.0
	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2301712	2301712	0	0.0
			.bss	179944	179944	0	0.0
			.data	5536	5536	0	0.0
			.text	1264312	1264312	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	4368	4368	0	0.0
			.text	103392	103392	0	0.0
	shell	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2053688	2053688	0	0.0
			.bss	156972	156972	0	0.0
			.data	4864	4864	0	0.0
			.text	1016288	1016288	0	0.0
nrfconnect	lighting-app	nrf52840dk_nrf52840	(read/write)	935579	935579	0	0.0
			bss	118400	118400	0	0.0
			rodata	108120	108120	0	0.0
			text	631508	631508	0	0.0
		nrf52840dk_nrf52840+rpc	(read/write)	921979	921979	0	0.0
			bss	115444	115444	0	0.0
			rodata	101536	101536	0	0.0
			text	626820	626820	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	859342	859342	0	0.0
			bss	116684	116684	0	0.0
			rodata	103044	103044	0	0.0
			text	558948	558948	0	0.0
	lock-app	nrf52840dk_nrf52840	(read/write)	907723	907723	0	0.0
			bss	117588	117588	0	0.0
			rodata	103424	103424	0	0.0
			text	609332	609332	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	831638	831638	0	0.0
			bss	115900	115900	0	0.0
			rodata	98388	98388	0	0.0
			text	536816	536816	0	0.0
	pigweed-app	nrf52840dk_nrf52840	(read/write)	542351	542351	0	0.0
			bss	52588	52588	0	0.0
			rodata	50668	50668	0	0.0
			text	376892	376892	0	0.0
	pump-app	nrf52840dk_nrf52840	(read/write)	912603	912603	0	0.0
			bss	117496	117496	0	0.0
			rodata	104768	104768	0	0.0
			text	612884	612884	0	0.0
	pump-controller-app	nrf52840dk_nrf52840	(read/write)	905803	905803	0	0.0
			bss	117376	117376	0	0.0
			rodata	102896	102896	0	0.0
			text	608080	608080	0	0.0
	shell	nrf52840dk_nrf52840	(read/write)	796079	796079	0	0.0
			bss	109464	109464	0	0.0
			rodata	78096	78096	0	0.0
			text	532048	532048	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	708710	708710	0	0.0
			bss	107352	107352	0	0.0
			rodata	72396	72396	0	0.0
			text	449544	449544	0	0.0
p6	all-clusters-app	default	(read/write)	2384640	2384640	0	0.0
			.bss	117260	117260	0	0.0
			.data	2544	2544	0	0.0
			.text	1342904	1342904	0	0.0
	light-app	default	(read/write)	2324008	2324008	0	0.0
			.bss	106152	106152	0	0.0
			.data	2384	2384	0	0.0
			.text	1282272	1282272	0	0.0
	lock-app	default	(read/write)	2296216	2296216	0	0.0
			.bss	105032	105032	0	0.0
			.data	2336	2336	0	0.0
			.text	1254480	1254480	0	0.0
qpg	lighting-app	qpg6105+debug	(read only)	531836	531836	0	0.0
			(read/write)	146936	146936	0	0.0
			.bss	86816	86816	0	0.0
			.data	1004	1004	0	0.0
			.text	526516	526516	0	0.0
	lock-app	qpg6105+debug	(read only)	503508	503508	0	0.0
			(read/write)	146940	146940	0	0.0
			.bss	85952	85952	0	0.0
			.data	952	952	0	0.0
			.text	498188	498188	0	0.0
	persistent-storage-app	qpg6105+debug	(read only)	106448	106448	0	0.0
			(read/write)	146938	146938	0	0.0
			.bss	36146	36146	0	0.0
			.data	288	288	0	0.0
			.text	101128	101128	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	830222	830222	0	0.0
			bss	87040	87040	0	0.0
			noinit	37160	37160	0	0.0
			text	578416	578416	0	0.0