release: cut the v19.2.21 release #3044

Job	Run time
list	34s
workflow (build-unit-tests)	2m 25s
workflow (modules-builder-tests)	1m 57s
workflow (devkit-core-tests-rerun)	1m 30s
workflow (devkit-core-tests)	1m 19s
workflow (build-cli)	1m 37s
	9m 22s

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