refactor: move test fixtures #7170

Job	Run time
Format check	46s
Build	1m 27s
Integration tests (ubuntu-latest)	1m 41s
Unit tests (macos-latest)	1m 54s
E2E tests (ubuntu-latest)	8m 4s
E2E tests (windows-latest)	16m 16s
E2E tests (macos-latest)	7m 56s
Unit tests (ubuntu-latest)	1m 20s
Integration tests (windows-latest)	3m 16s
Integration tests (macos-latest)	1m 46s
Linter	2m 41s
Unit tests (windows-latest)	2m 32s
	49m 39s

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