[cli] add cli command to clear EID-RLOC cache

[sarveshkumarv3]

Add cli command support to clear the EID-RLOC cache for testing purposes

[size-report]

Size Report of OpenThread

Merging #9985 into main(5c6b832).

name	branch	text	data	bss	total
ot-cli-ftd	main	467224	856	66364	534444
	#9985	467272	856	66364	534492
	+/-	+48	0	0	+48
ot-ncp-ftd	main	436140	760	61576	498476
	#9985	436140	760	61576	498476
	+/-	0	0	0	0
libopenthread-ftd.a	main	236166	95	40310	276571
	#9985	236176	95	40310	276581
	+/-	+10	0	0	+10
libopenthread-cli-ftd.a	main	57549	0	8075	65624
	#9985	57577	0	8075	65652
	+/-	+28	0	0	+28
libopenthread-ncp-ftd.a	main	31857	0	5916	37773
	#9985	31857	0	5916	37773
	+/-	0	0	0	0
ot-cli-mtd	main	364712	760	51220	416692
	#9985	364712	760	51220	416692
	+/-	0	0	0	0
ot-ncp-mtd	main	347244	760	46448	394452
	#9985	347244	760	46448	394452
	+/-	0	0	0	0
libopenthread-mtd.a	main	158229	0	25182	183411
	#9985	158229	0	25182	183411
	+/-	0	0	0	0
libopenthread-cli-mtd.a	main	39787	0	8059	47846
	#9985	39787	0	8059	47846
	+/-	0	0	0	0
libopenthread-ncp-mtd.a	main	24737	0	5916	30653
	#9985	24737	0	5916	30653
	+/-	0	0	0	0
ot-cli-ftd-br	main	536080	864	131076	668020
	#9985	536112	864	131076	668052
	+/-	+32	0	0	+32
libopenthread-ftd-br.a	main	299619	100	104998	404717
	#9985	299629	100	104998	404727
	+/-	+10	0	0	+10
libopenthread-cli-ftd-br.a	main	71212	0	8099	79311
	#9985	71240	0	8099	79339
	+/-	+28	0	0	+28
ot-rcp	main	62248	564	20604	83416
	#9985	62248	564	20604	83416
	+/-	0	0	0	0
libopenthread-rcp.a	main	9542	0	5052	14594
	#9985	9542	0	5052	14594
	+/-	0	0	0	0
libopenthread-radio.a	main	18870	0	214	19084
	#9985	18870	0	214	19084
	+/-	0	0	0	0

[abtink]

Looks great. Thanks.
Some smaller suggestions below:

[abtink]

LGTM. 👍
(one small style change below).