Revert "OperationGroupKey derivation updated according to new spec."

[woody-apple]

Reverts #15526

[woody-apple]

Hot fixing broken tree

[github-actions]

PR #15879: Size comparison from 2ecc827 to a689eff

Decreases (7 builds for efr32, qpg, telink)

platform	target	config	section	2ecc827	a689eff	change	% change
efr32	lighting-app	BRD4161A	(read only)	920212	920148	-64	-0.0
			.text	920204	920140	-64	-0.0
		BRD4161A+rpc	(read only)	949024	948960	-64	-0.0
			.text	949016	948952	-64	-0.0
	lock-app	BRD4161A+wf200	(read only)	988396	988380	-16	-0.0
			.text	988388	988372	-16	-0.0
	window-app	BRD4161A	(read only)	853472	853456	-16	-0.0
			.text	853464	853448	-16	-0.0
qpg	lighting-app	qpg6105+debug	(read only)	603444	603396	-48	-0.0
			.text	598124	598076	-48	-0.0
	lock-app	qpg6105+debug	(read only)	569064	569056	-8	-0.0
			.text	563744	563736	-8	-0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	888522	888466	-56	-0.0
			text	627914	627864	-50	-0.0

Full report (11 builds for efr32, k32w, mbed, qpg, telink)

platform	target	config	section	2ecc827	a689eff	change	% change
efr32	lighting-app	BRD4161A	(read only)	920212	920148	-64	-0.0
			(read/write)	128832	128832	0	0.0
			.bss	126752	126752	0	0.0
			.data	2080	2080	0	0.0
			.text	920204	920140	-64	-0.0
		BRD4161A+rpc	(read only)	949024	948960	-64	-0.0
			(read/write)	144792	144792	0	0.0
			.bss	142528	142528	0	0.0
			.data	2260	2260	0	0.0
			.text	949016	948952	-64	-0.0
	lock-app	BRD4161A+wf200	(read only)	988396	988380	-16	-0.0
			(read/write)	120360	120360	0	0.0
			.bss	118428	118428	0	0.0
			.data	1932	1932	0	0.0
			.text	988388	988372	-16	-0.0
	window-app	BRD4161A	(read only)	853472	853456	-16	-0.0
			(read/write)	126832	126832	0	0.0
			.bss	124904	124904	0	0.0
			.data	1924	1924	0	0.0
			.text	853464	853448	-16	-0.0
k32w	light	k32w061+release	(read/write)	694204	694204	0	0.0
			.bss	77688	77688	0	0.0
			.data	1964	1964	0	0.0
			.text	608752	608752	0	0.0
	lock	k32w061+release	(read/write)	696032	696032	0	0.0
			.bss	77664	77664	0	0.0
			.data	1972	1972	0	0.0
			.text	610596	610596	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2350324	2350324	0	0.0
			.bss	186076	186076	0	0.0
			.data	5800	5800	0	0.0
			.text	1312924	1312924	0	0.0
qpg	lighting-app	qpg6105+debug	(read only)	603444	603396	-48	-0.0
			(read/write)	146936	146936	0	0.0
			.bss	91064	91064	0	0.0
			.data	1164	1164	0	0.0
			.text	598124	598076	-48	-0.0
	lock-app	qpg6105+debug	(read only)	569064	569056	-8	-0.0
			(read/write)	146936	146936	0	0.0
			.bss	91072	91072	0	0.0
			.data	1116	1116	0	0.0
			.text	563744	563736	-8	-0.0
	persistent-storage-app	qpg6105+debug	(read only)	99520	99520	0	0.0
			(read/write)	146940	146940	0	0.0
			.bss	24004	24004	0	0.0
			.data	176	176	0	0.0
			.text	94200	94200	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	888522	888466	-56	-0.0
			bss	86920	86920	0	0.0
			noinit	37160	37160	0	0.0
			text	627914	627864	-50	-0.0