chore: update Nx to v21 #6327

Job	Run time
Format check	35s
Linter	5m 47s
Build	1m 21s
E2E tests (windows-latest)	12m 33s
Unit tests (windows-latest)	1m 26s
Integration tests (macos-latest)	2m 6s
Unit tests (ubuntu-latest)	1m 10s
Integration tests (ubuntu-latest)	1m 33s
Unit tests (macos-latest)	49s
Integration tests (windows-latest)	1m 25s
E2E tests (ubuntu-latest)	6m 58s
E2E tests (macos-latest)	6m 11s
	41m 54s

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