test: standardise mock and setup file and testing related folder names #7247

Job	Run time
Format check	50s
E2E tests (ubuntu-latest)	8m 23s
Linter	3m 31s
E2E tests (windows-latest)	15m 59s
Unit tests (windows-latest)	2m 35s
Integration tests (macos-latest)	2m 13s
Integration tests (windows-latest)	3m 8s
Build	1m 31s
Integration tests (ubuntu-latest)	1m 43s
E2E tests (macos-latest)	12m 49s
Unit tests (macos-latest)	1m 41s
Unit tests (ubuntu-latest)	1m 24s
	55m 47s

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