refactor: move test fixtures #7040

Job	Run time
Format check	42s
E2E tests (windows-latest)	13m 34s
Integration tests (ubuntu-latest)	1m 37s
E2E tests (ubuntu-latest)	7m 29s
E2E tests (macos-latest)	12m 11s
Unit tests (ubuntu-latest)	46s
Unit tests (macos-latest)	50s
Build	1m 25s
Unit tests (windows-latest)	2m 53s
Linter	3m 26s
Integration tests (windows-latest)	1m 56s
Integration tests (macos-latest)	1m 32s
	48m 21s

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