test: standardise mock and setup file and testing related folder names #7222

Job	Run time
Build	1m 30s
Format check	47s
Linter	1m 48s
E2E tests (windows-latest)	14m 34s
E2E tests (macos-latest)	9m 29s
Unit tests (windows-latest)	2m 23s
E2E tests (ubuntu-latest)	7m 49s
Integration tests (windows-latest)	3m 17s
Integration tests (ubuntu-latest)	1m 40s
Integration tests (macos-latest)	1m 45s
Unit tests (ubuntu-latest)	1m 20s
Unit tests (macos-latest)	1m 23s
	47m 45s

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