release: cut the v21.2.0-next.0 release #9715

Job	Run time
lint	2m 1s
build-e2e-windows	2m 44s
build	2m 11s
Browser Compatibility Tests	2m 24s
test	2m 22s
publish-snapshots	2m 24s
e2e-windows (24, esbuild, 2)	1m 47s
e2e-windows (24, webpack, 0)	1m 48s
e2e-windows (24, esbuild, 0)	1m 47s
e2e-windows (24, esbuild, 3)	1m 48s
e2e-windows (24, esbuild, 1)	1m 47s
e2e-windows (24, webpack, 5)	1m 48s
e2e-windows (24, webpack, 3)	1m 47s
e2e-windows (24, webpack, 4)	1m 45s
e2e-windows (24, esbuild, 4)	1m 48s
e2e-windows (24, webpack, 1)	1m 47s
e2e-windows (24, webpack, 2)	1m 47s
e2e-windows (24, esbuild, 5)	1m 49s
e2e	1s
e2e-package-managers	1s
e2e-snapshots	1s
	35m 37s

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