test: standardise mock and setup file and testing related folder names #7220

Job	Run time
Linter	1m 52s
Format check	45s
Integration tests (windows-latest)	3m 26s
Integration tests (ubuntu-latest)	1m 42s
Unit tests (macos-latest)	2m 33s
Build	1m 36s
Integration tests (macos-latest)	1m 58s
E2E tests (windows-latest)	15m 44s
E2E tests (macos-latest)	11m 28s
Unit tests (windows-latest)	2m 46s
E2E tests (ubuntu-latest)	8m 8s
Unit tests (ubuntu-latest)	1m 20s
	53m 18s

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