chore: update Nx to v21 #6314

Job	Run time
Format check	41s
Linter	2m 28s
Unit tests (ubuntu-latest)	46s
Integration tests (macos-latest)	43s
E2E tests (macos-latest)	7m 44s
Unit tests (macos-latest)	50s
Unit tests (windows-latest)	1m 45s
Integration tests (windows-latest)	1m 38s
E2E tests (windows-latest)	12m 34s
Build	55s
Integration tests (ubuntu-latest)	41s
E2E tests (ubuntu-latest)	6m 29s
	37m 14s

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