Truncate string test value to maxLength in Darwin tests

[Morozov-5F]

Problem

Fix Darwin test case failure in #12639 due to out-of-bounds test value.

Change overview

Now helper.js truncates strings for OCTET_STRING and CHAR_STRING types to their maximum length for Darwin tests.

Testing

How was this tested? (at least one bullet point required)

• Regenerated all the auto-generated code both for master and Door Lock cluster rework: phase 1 #12639 to make sure there were no unexpected changes.
• Ran Darwin tests with changes from Door Lock cluster rework: phase 1 #12639.
• Wrote Tes into Language attribute in Door Lock Cluster (in Door Lock cluster rework: phase 1 #12639).

[github-actions]

PR #12844: Size comparison from b20bf90 to 47dca06

Full report (32 builds for efr32, esp32, k32w, linux, mbed, nrfconnect, p6, qpg, telink)

platform	target	config	section	b20bf90	47dca06	change	% change
efr32	lighting-app	BRD4161A	(read only)	807372	807372	0	0.0
			(read/write)	123008	123008	0	0.0
			.bss	121160	121160	0	0.0
			.data	1848	1848	0	0.0
			.text	807364	807364	0	0.0
		BRD4161A+rpc	(read only)	794992	794992	0	0.0
			(read/write)	139696	139696	0	0.0
			.bss	137736	137736	0	0.0
			.data	1956	1956	0	0.0
			.text	794984	794984	0	0.0
	window-app	BRD4161A	(read only)	784348	784348	0	0.0
			(read/write)	121140	121140	0	0.0
			.bss	119328	119328	0	0.0
			.data	1812	1812	0	0.0
			.text	784340	784340	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	861936	861936	0	0.0
			(read/write)	1305602	1305602	0	0.0
			.dram0.bss	65696	65696	0	0.0
			.dram0.data	14124	14124	0	0.0
			.flash.rodata	172752	172752	0	0.0
			.flash.text	861936	861936	0	0.0
			.iram0.text	62076	62076	0	0.0
		m5stack	(read only)	965067	965067	0	0.0
			(read/write)	451296	451296	0	0.0
			.dram0.bss	74992	74992	0	0.0
			.dram0.data	34048	34048	0	0.0
			.flash.rodata	210468	210468	0	0.0
			.flash.text	959683	959683	0	0.0
			.iram0.text	123451	123451	0	0.0
k32w	lighting-app	k32w061+se05x+release	(read/write)	668468	668468	0	0.0
			.bss	73744	73744	0	0.0
			.data	1880	1880	0	0.0
			.text	587044	587044	0	0.0
	lock-app	k32w061+debug	(read/write)	618428	618428	0	0.0
			.bss	71896	71896	0	0.0
			.data	1848	1848	0	0.0
			.text	538884	538884	0	0.0
	shell	k32w061+debug	(read/write)	623520	623520	0	0.0
			.bss	74124	74124	0	0.0
			.data	1820	1820	0	0.0
			.text	541776	541776	0	0.0
linux	chip-tool-ipv6only	arm64	(read only)	6792140	6792140	0	0.0
			(read/write)	318273	318273	0	0.0
			.bss	51713	51713	0	0.0
			.data	1096	1096	0	0.0
			.data.rel.ro	208720	208720	0	0.0
			.dynamic	560	560	0	0.0
			.got	53048	53048	0	0.0
			.init	24	24	0	0.0
			.init_array	168	168	0	0.0
			.rodata	363884	363884	0	0.0
			.text	5749316	5749316	0	0.0
	thermostat-no-ble	arm64	(read only)	1943044	1943044	0	0.0
			(read/write)	136865	136865	0	0.0
			.bss	59441	59441	0	0.0
			.data	824	824	0	0.0
			.data.rel.ro	70160	70160	0	0.0
			.dynamic	560	560	0	0.0
			.got	3568	3568	0	0.0
			.init	24	24	0	0.0
			.init_array	264	264	0	0.0
			.rodata	125300	125300	0	0.0
			.text	1610592	1610592	0	0.0
mbed	all-clusters-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2323312	2323312	0	0.0
			.bss	184972	184972	0	0.0
			.data	5232	5232	0	0.0
			.heap	846240	846240	0	0.0
			.text	1285888	1285888	0	0.0
	lighting-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2307944	2307944	0	0.0
			.bss	175688	175688	0	0.0
			.data	5520	5520	0	0.0
			.heap	855240	855240	0	0.0
			.text	1270544	1270544	0	0.0
	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2281056	2281056	0	0.0
			.bss	174728	174728	0	0.0
			.data	5520	5520	0	0.0
			.heap	856200	856200	0	0.0
			.text	1243656	1243656	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)	2053344	2053344	0	0.0
			.bss	156892	156892	0	0.0
			.data	4864	4864	0	0.0
			.heap	874688	874688	0	0.0
			.text	1015944	1015944	0	0.0
nrfconnect	lighting-app	nrf52840dk_nrf52840	(read/write)	905563	905563	0	0.0
			bss	116168	116168	0	0.0
			rodata	101676	101676	0	0.0
			text	612124	612124	0	0.0
		nrf52840dk_nrf52840+rpc	(read/write)	868603	868603	0	0.0
			bss	112516	112516	0	0.0
			rodata	92972	92972	0	0.0
			text	586852	586852	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	831554	831554	0	0.0
			bss	117544	117544	0	0.0
			rodata	96932	96932	0	0.0
			text	542552	542552	0	0.0
	lock-app	nrf52840dk_nrf52840	(read/write)	878191	878191	0	0.0
			bss	113432	113432	0	0.0
			rodata	97792	97792	0	0.0
			text	591568	591568	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	804422	804422	0	0.0
			bss	114840	114840	0	0.0
			rodata	93080	93080	0	0.0
			text	522088	522088	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)	883119	883119	0	0.0
			bss	113344	113344	0	0.0
			rodata	99144	99144	0	0.0
			text	595156	595156	0	0.0
	pump-controller-app	nrf52840dk_nrf52840	(read/write)	876363	876363	0	0.0
			bss	113220	113220	0	0.0
			rodata	97284	97284	0	0.0
			text	590356	590356	0	0.0
	shell	nrf52840dk_nrf52840	(read/write)	781947	781947	0	0.0
			bss	109544	109544	0	0.0
			rodata	74280	74280	0	0.0
			text	523604	523604	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	696994	696994	0	0.0
			bss	110524	110524	0	0.0
			rodata	68924	68924	0	0.0
			text	444244	444244	0	0.0
p6	all-clusters-app	default	(read/write)	2360072	2360072	0	0.0
			.bss	113108	113108	0	0.0
			.data	2512	2512	0	0.0
			.heap	917720	917720	0	0.0
			.text	1318336	1318336	0	0.0
	light-app	default	(read/write)	2292856	2292856	0	0.0
			.bss	100880	100880	0	0.0
			.data	2352	2352	0	0.0
			.heap	930112	930112	0	0.0
			.text	1251120	1251120	0	0.0
	lock-app	default	(read/write)	2268936	2268936	0	0.0
			.bss	99760	99760	0	0.0
			.data	2320	2320	0	0.0
			.heap	931264	931264	0	0.0
			.text	1227200	1227200	0	0.0
qpg	lighting-app	qpg6100+debug	(read only)	520260	520260	0	0.0
			(read/write)	122336	122336	0	0.0
			.bss	82616	82616	0	0.0
			.data	984	984	0	0.0
			.text	514940	514940	0	0.0
	lock-app	qpg6100+debug	(read only)	494636	494636	0	0.0
			(read/write)	122332	122332	0	0.0
			.bss	81752	81752	0	0.0
			.data	940	940	0	0.0
			.text	489316	489316	0	0.0
	persistent-storage-app	qpg6100+debug	(read only)	108104	108104	0	0.0
			(read/write)	122336	122336	0	0.0
			.bss	36152	36152	0	0.0
			.data	288	288	0	0.0
			.text	102784	102784	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	809658	809658	0	0.0
			bss	82736	82736	0	0.0
			noinit	37160	37160	0	0.0
			text	565158	565158	0	0.0

[woody-apple]

Fast tracking, given this is fixing tests