refactor: move test fixtures #7033

Job	Run time
Linter	2m 7s
Format check	47s
Unit tests (macos-latest)	3m 18s
Integration tests (macos-latest)	2m 23s
Build	1m 29s
Unit tests (ubuntu-latest)	1m 31s
Unit tests (windows-latest)	2m 41s
Integration tests (ubuntu-latest)	1m 42s
E2E tests (ubuntu-latest)	7m 34s
E2E tests (macos-latest)	8m 16s
E2E tests (windows-latest)	14m 47s
Integration tests (windows-latest)	4m 13s
	50m 48s

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