chore: update Nx to v21 #6339

Job	Run time
Linter	2m 15s
Format check	36s
Integration tests (macos-latest)	59s
Unit tests (macos-latest)	1m 0s
Build	1m 11s
Integration tests (windows-latest)	1m 21s
Unit tests (ubuntu-latest)	45s
E2E tests (ubuntu-latest)	7m 18s
Integration tests (ubuntu-latest)	1m 28s
Unit tests (windows-latest)	1m 31s
E2E tests (windows-latest)	13m 21s
E2E tests (macos-latest)	8m 48s
	40m 33s

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