release: cut the v21.2.19 release #3905

Job	Run time
list	25s
workflow (devkit-core-tests)	1m 45s
workflow (devkit-core-tests-rerun)	1m 59s
workflow (build-unit-tests)	2m 31s
workflow (modules-builder-tests)	2m 9s
workflow (build-cli)	1m 58s
	10m 47s

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