chore: update Nx to v21 #6338

Job	Run time
Linter	2m 26s
Format check	46s
Integration tests (ubuntu-latest)	33s
Unit tests (ubuntu-latest)	42s
Integration tests (macos-latest)	1m 43s
Integration tests (windows-latest)	2m 8s
Unit tests (macos-latest)	53s
Unit tests (windows-latest)	1m 34s
E2E tests (macos-latest)	7m 2s
E2E tests (ubuntu-latest)	6m 13s
E2E tests (windows-latest)	12m 16s
Build	33s
	36m 49s

Provide feedback