release: cut the v21.1.0-next.1 release #2627

Job	Run time
list	24s
workflow (modules-builder-tests)	1m 47s
workflow (devkit-core-tests)	1m 16s
workflow (build-unit-tests)	2m 14s
workflow (devkit-core-tests-rerun)	1m 20s
workflow (build-cli)	1m 36s
	8m 37s

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