release: cut the v21.2.0 release #3086

Job	Run time
list	29s
workflow (devkit-core-tests)	1m 43s
workflow (build-unit-tests)	2m 41s
workflow (modules-builder-tests)	2m 12s
workflow (devkit-core-tests-rerun)	1m 53s
workflow (build-cli)	2m 0s
	10m 58s

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