release: cut the v21.1.0 release #2864

Job	Run time
list	21s
workflow (devkit-core-tests)	1m 32s
workflow (build-unit-tests)	2m 31s
workflow (build-cli)	1m 44s
workflow (modules-builder-tests)	2m 1s
workflow (devkit-core-tests-rerun)	1m 22s
	9m 31s

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