refactor: move test fixtures #7030

Job	Run time
Linter	2m 22s
Integration tests (ubuntu-latest)	1m 53s
Format check	42s
Build	1m 26s
Integration tests (windows-latest)	3m 57s
Integration tests (macos-latest)	2m 34s
E2E tests (windows-latest)	17m 23s
Unit tests (ubuntu-latest)	1m 10s
Unit tests (macos-latest)	1m 19s
Unit tests (windows-latest)	2m 44s
E2E tests (macos-latest)	9m 35s
E2E tests (ubuntu-latest)	7m 42s
	52m 47s

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