shell: Fixed dns resolve and browse commands

[kkasperczyk-no]

Problem

Currently the dns resolve and dns browse commands don't work, as after adding ResolverProxy the shell Dns module uses wrong Resolver instance and operations fail due to delegate set to null.

Change overview

Utilized ResolverProxy instead of Resolve Instace().

Testing

Tested manually that dns resolve and dns browse commands work properly.

[github-actions]

PR #13451: Size comparison from a841e21 to 7adb005

Increases (5 builds for esp32, linux, mbed, nrfconnect)

platform	target	config	section	a841e21	7adb005	change	% change
esp32	all-clusters-app	m5stack	(read only)	952483	952511	28	0.0
			(read/write)	446360	446368	8	0.0
			.dram0.bss	74304	74312	8	0.0
			.flash.text	947099	947127	28	0.0
linux	thermostat-no-ble	arm64	(read only)	2036572	2036652	80	0.0
			(read/write)	145377	145409	32	0.0
			.bss	64721	64737	16	0.0
			.got	4008	4016	8	0.2
			.text	1693360	1693424	64	0.0
mbed	shell	CY8CPROTO_062_4343W+release	(read/write)	2054432	2054880	448	0.0
			.bss	157060	157068	8	0.0
			.text	1017032	1017480	448	0.0
nrfconnect	shell	nrf52840dk_nrf52840	(read/write)	798063	798127	64	0.0
			bss	109768	109776	8	0.0
			text	533608	533668	60	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	710882	710946	64	0.0
			bss	107656	107664	8	0.0
			text	451288	451348	60	0.0

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

platform	target	config	section	a841e21	7adb005	change	% change
efr32	lighting-app	BRD4161A	(read only)	829972	829972	0	0.0
			(read/write)	127056	127056	0	0.0
			.bss	125176	125176	0	0.0
			.data	1880	1880	0	0.0
			.text	829964	829964	0	0.0
		BRD4161A+rpc	(read only)	817168	817168	0	0.0
			(read/write)	143720	143720	0	0.0
			.bss	141736	141736	0	0.0
			.data	1980	1980	0	0.0
			.text	817160	817160	0	0.0
	window-app	BRD4161A	(read only)	803436	803436	0	0.0
			(read/write)	125996	125996	0	0.0
			.bss	124160	124160	0	0.0
			.data	1836	1836	0	0.0
			.text	803428	803428	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	892608	892608	0	0.0
			(read/write)	1314786	1314786	0	0.0
			.dram0.bss	69824	69824	0	0.0
			.dram0.data	14244	14244	0	0.0
			.flash.rodata	177656	177656	0	0.0
			.flash.text	892608	892608	0	0.0
			.iram0.text	62254	62254	0	0.0
		m5stack	(read only)	952483	952511	28	0.0
			(read/write)	446360	446368	8	0.0
			.dram0.bss	74304	74312	8	0.0
			.dram0.data	34064	34064	0	0.0
			.flash.rodata	206984	206984	0	0.0
			.flash.text	947099	947127	28	0.0
			.iram0.text	122671	122671	0	0.0
k32w	light	k32w061+release	(read/write)	656148	656148	0	0.0
			.bss	76824	76824	0	0.0
			.data	1852	1852	0	0.0
			.text	571672	571672	0	0.0
	lock	k32w061+release	(read/write)	660488	660488	0	0.0
			.bss	77120	77120	0	0.0
			.data	1872	1872	0	0.0
			.text	575696	575696	0	0.0
linux	chip-tool-ipv6only	arm64	(read only)	7113260	7113260	0	0.0
			(read/write)	327377	327377	0	0.0
			.bss	54865	54865	0	0.0
			.data	1096	1096	0	0.0
			.data.rel.ro	209544	209544	0	0.0
			.dynamic	560	560	0	0.0
			.got	58184	58184	0	0.0
			.init	24	24	0	0.0
			.init_array	168	168	0	0.0
			.rodata	390132	390132	0	0.0
			.text	6025556	6025556	0	0.0
	thermostat-no-ble	arm64	(read only)	2036572	2036652	80	0.0
			(read/write)	145377	145409	32	0.0
			.bss	64721	64737	16	0.0
			.data	880	880	0	0.0
			.data.rel.ro	72832	72832	0	0.0
			.dynamic	560	560	0	0.0
			.got	4008	4016	8	0.2
			.init	24	24	0	0.0
			.init_array	304	304	0	0.0
			.rodata	129244	129244	0	0.0
			.text	1693360	1693424	64	0.0
mbed	all-clusters-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2349496	2349496	0	0.0
			.bss	189068	189068	0	0.0
			.data	5320	5320	0	0.0
			.text	1312072	1312072	0	0.0
	lighting-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2331144	2331144	0	0.0
			.bss	180600	180600	0	0.0
			.data	5552	5552	0	0.0
			.text	1293744	1293744	0	0.0
	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2304432	2304432	0	0.0
			.bss	179648	179648	0	0.0
			.data	5544	5544	0	0.0
			.text	1267032	1267032	0	0.0
	pigweed-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	1139712	1139712	0	0.0
			.bss	11756	11756	0	0.0
			.data	4368	4368	0	0.0
			.text	103096	103096	0	0.0
	shell	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2054432	2054880	448	0.0
			.bss	157060	157068	8	0.0
			.data	4864	4864	0	0.0
			.text	1017032	1017480	448	0.0
nrfconnect	lighting-app	nrf52840dk_nrf52840	(read/write)	939003	939003	0	0.0
			bss	119284	119284	0	0.0
			rodata	108232	108232	0	0.0
			text	633916	633916	0	0.0
		nrf52840dk_nrf52840+rpc	(read/write)	924467	924467	0	0.0
			bss	116328	116328	0	0.0
			rodata	100680	100680	0	0.0
			text	629268	629268	0	0.0
		nrf52840dongle_nrf52840	(read/write)	989679	989679	0	0.0
			bss	122128	122128	0	0.0
			rodata	112984	112984	0	0.0
			text	666112	666112	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	848858	848858	0	0.0
			bss	116072	116072	0	0.0
			rodata	101404	101404	0	0.0
			text	550836	550836	0	0.0
	lock-app	nrf52840dk_nrf52840	(read/write)	911275	911275	0	0.0
			bss	118472	118472	0	0.0
			rodata	103504	103504	0	0.0
			text	611912	611912	0	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	821310	821310	0	0.0
			bss	115288	115288	0	0.0
			rodata	96728	96728	0	0.0
			text	528872	528872	0	0.0
	pigweed-app	nrf52840dk_nrf52840	(read/write)	541835	541835	0	0.0
			bss	52588	52588	0	0.0
			rodata	50104	50104	0	0.0
			text	376940	376940	0	0.0
	pump-app	nrf52840dk_nrf52840	(read/write)	912567	912567	0	0.0
			bss	118232	118232	0	0.0
			rodata	103716	103716	0	0.0
			text	613172	613172	0	0.0
	pump-controller-app	nrf52840dk_nrf52840	(read/write)	909355	909355	0	0.0
			bss	118260	118260	0	0.0
			rodata	102976	102976	0	0.0
			text	610660	610660	0	0.0
	shell	nrf52840dk_nrf52840	(read/write)	798063	798127	64	0.0
			bss	109768	109776	8	0.0
			rodata	78180	78180	0	0.0
			text	533608	533668	60	0.0
		nrf5340dk_nrf5340_cpuapp	(read/write)	710882	710946	64	0.0
			bss	107656	107664	8	0.0
			rodata	72484	72484	0	0.0
			text	451288	451348	60	0.0
p6	all-clusters-app	default	(read/write)	2402808	2402808	0	0.0
			.bss	117148	117148	0	0.0
			.data	2592	2592	0	0.0
			.text	1361072	1361072	0	0.0
	light-app	default	(read/write)	2324800	2324800	0	0.0
			.bss	105728	105728	0	0.0
			.data	2384	2384	0	0.0
			.text	1283064	1283064	0	0.0
	lock-app	default	(read/write)	2297024	2297024	0	0.0
			.bss	104608	104608	0	0.0
			.data	2344	2344	0	0.0
			.text	1255288	1255288	0	0.0
qpg	lighting-app	qpg6105+debug	(read only)	533852	533852	0	0.0
			(read/write)	146940	146940	0	0.0
			.bss	86672	86672	0	0.0
			.data	1008	1008	0	0.0
			.text	528532	528532	0	0.0
	lock-app	qpg6105+debug	(read only)	505772	505772	0	0.0
			(read/write)	146936	146936	0	0.0
			.bss	85808	85808	0	0.0
			.data	956	956	0	0.0
			.text	500452	500452	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)	835562	835562	0	0.0
			bss	86976	86976	0	0.0
			noinit	37160	37160	0	0.0
			text	583540	583540	0	0.0