build: angular v21 support #1875

Job	Run time
premerge-build	1m 50s
premerge-integration-test (integration:ng21)	2m 2s
premerge-test (lint)	1m 22s
premerge-test (test)	1m 46s
premerge-integration-test (test:types)	1m 39s
premerge-bundlemon	1m 46s
	10m 25s

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