release: cut the v21.2.0-next.0 release #2936

Job	Run time
list	25s
workflow (devkit-core-tests)	1m 21s
workflow (devkit-core-tests-rerun)	1m 23s
workflow (build-cli)	1m 27s
workflow (modules-builder-tests)	1m 50s
workflow (build-unit-tests)	2m 35s
	9m 1s

Provide feedback