release: cut the v21.1.0-next.0 release #2584

Job	Run time
list	22s
workflow (build-unit-tests)	2m 20s
workflow (devkit-core-tests)	1m 30s
workflow (devkit-core-tests-rerun)	1m 18s
workflow (modules-builder-tests)	1m 42s
workflow (build-cli)	1m 38s
	8m 50s

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