Revert "Pull pigweed (#10792)"

[andy31415]

Builds seem to fail:

20211021 20:09:52 ERR Build error for
//third_party/connectedhomeip/third_party/pigweed/repo/pw_sync:mutex.NO_BACKEND_SET(//third_party/connectedhomeip/config/esp32/toolchain:esp32):
20211021 20:09:52 ERR
20211021 20:09:52 ERR   Attempted to build the
//third_party/connectedhomeip/third_party/pigweed/repo/pw_sync:mutex
facade with no backend.
20211021 20:09:52 ERR
...

This reverts commit bb96f04.

[andy31415]

For the original PR, I had waited for some CI to pass, but apparently not enough. I learned that "wait for all CI" should probably still remain a requirement for any fast track.

[github-actions]

PR #10797: Size comparison from 114d413 to aeed08c

8 builds (for k32w, p6, qpg, telink)

platform	target	config	section	114d413	aeed08c	change	% change
k32w	lock-app	k32w061+debug	.bss	69060	69060	0	0.0
			.data	1864	1864	0	0.0
			.text	514680	514680	0	0.0
	shell	k32w061+debug	.bss	55080	55080	0	0.0
			.data	672	672	0	0.0
			.text	357416	357416	0	0.0
	lighting-app	k32w061+se05x+release	.bss	78584	78584	0	0.0
			.data	1900	1900	0	0.0
			.text	613464	613464	0	0.0
p6	lock-app	default	.bss	68208	68208	0	0.0
			.data	2416	2416	0	0.0
			.heap	962720	962720	0	0.0
			.text	1125456	1125456	0	0.0
qpg	lighting-app	qpg6100+debug	.bss	53552	53552	0	0.0
			.data	996	996	0	0.0
			.text	485628	485628	0	0.0
	lock-app	qpg6100+debug	.bss	52496	52496	0	0.0
			.data	952	952	0	0.0
			.text	461716	461716	0	0.0
	persistent-storage-app	qpg6100+debug	.bss	17778	17778	0	0.0
			.data	280	280	0	0.0
			.text	102756	102756	0	0.0
telink	lighting-app	tlsr9518adk80d	bss	70992	70992	0	0.0
			noinit	33216	33216	0	0.0
			text	457314	457314	0	0.0

10 builds (for linux, mbed)

platform	target	config	section	114d413	aeed08c	change	% change
linux	all-clusters-app	debug	.bss	52176	52176	0	0.0
			.data	978	978	0	0.0
			.data.rel.ro	59072	59072	0	0.0
			.dynamic	592	592	0	0.0
			.got	4080	4080	0	0.0
			.init	27	27	0	0.0
			.init_array	512	512	0	0.0
			.rodata	136117	136117	0	0.0
			.text	1340098	1340098	0	0.0
	chip-tool	debug	.bss	17520	17520	0	0.0
			.data	1584	1584	0	0.0
			.data.rel.ro	91984	91984	0	0.0
			.dynamic	592	592	0	0.0
			.got	4344	4344	0	0.0
			.init	27	27	0	0.0
			.init_array	416	416	0	0.0
			.rodata	183524	183524	0	0.0
			.text	3456325	3456325	0	0.0
	ota-provider-app	debug	.bss	37440	37440	0	0.0
			.data	752	752	0	0.0
			.data.rel.ro	23176	23176	0	0.0
			.dynamic	592	592	0	0.0
			.got	4008	4008	0	0.0
			.init	27	27	0	0.0
			.init_array	440	440	0	0.0
			.rodata	109960	109960	0	0.0
			.text	1009058	1009058	0	0.0
	ota-requestor-app	debug	.bss	205696	205696	0	0.0
			.data	752	752	0	0.0
			.data.rel.ro	24488	24488	0	0.0
			.dynamic	592	592	0	0.0
			.got	4136	4136	0	0.0
			.init	27	27	0	0.0
			.init_array	512	512	0	0.0
			.rodata	128104	128104	0	0.0
			.text	1127602	1127602	0	0.0
	shell	debug	.bss	16072	16072	0	0.0
			.data	242	242	0	0.0
			.data.rel.ro	35120	35120	0	0.0
			.dynamic	592	592	0	0.0
			.got	3496	3496	0	0.0
			.init	27	27	0	0.0
			.init_array	336	336	0	0.0
			.rodata	71855	71855	0	0.0
			.text	570242	570242	0	0.0
	tv-app	debug	.bss	216560	216560	0	0.0
			.data	2032	2032	0	0.0
			.data.rel.ro	56096	56096	0	0.0
			.dynamic	592	592	0	0.0
			.got	4400	4400	0	0.0
			.init	27	27	0	0.0
			.init_array	608	608	0	0.0
			.rodata	152616	152616	0	0.0
			.text	1441122	1441122	0	0.0
	bridge-app	debug+rpc	.bss	52880	52880	0	0.0
			.data	976	976	0	0.0
			.data.rel.ro	25784	25784	0	0.0
			.dynamic	592	592	0	0.0
			.got	3944	3944	0	0.0
			.init	27	27	0	0.0
			.init_array	400	400	0	0.0
			.rodata	110460	110460	0	0.0
			.text	1048965	1048965	0	0.0
	lighting-app	debug+rpc	.bss	42200	42200	0	0.0
			.data	1138	1106	-32	-2.8
			.data.rel.ro	52496	52496	0	0.0
			.dynamic	608	608	0	0.0
			.got	4104	4104	0	0.0
			.init	27	27	0	0.0
			.init_array	528	528	0	0.0
			.rodata	128145	127633	-512	-0.4
			.text	1250898	1249186	-1712	-0.1
mbed	lighting-app	CY8CPROTO_062_4343W+release	.bss	172092	172092	0	0.0
			.data	5464	5464	0	0.0
			.heap	858888	858888	0	0.0
			.text	1219200	1219200	0	0.0
	lock-app	CY8CPROTO_062_4343W+release	.bss	171012	171012	0	0.0
			.data	5432	5432	0	0.0
			.heap	860000	860000	0	0.0
			.text	1197032	1197032	0	0.0