chore: update Nx to v21 #6312

Job	Run time
Linter	3m 2s
Unit tests (windows-latest)	1m 48s
Unit tests (macos-latest)	49s
Integration tests (windows-latest)	2m 29s
Integration tests (ubuntu-latest)	1m 32s
Format check	39s
Unit tests (ubuntu-latest)	1m 8s
Integration tests (macos-latest)	1m 6s
E2E tests (ubuntu-latest)	7m 4s
E2E tests (macos-latest)	6m 57s
Build	1m 17s
E2E tests (windows-latest)	14m 6s
	41m 57s

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