test: standardise mock and setup file and testing related folder names #7221

Job	Run time
Format check	51s
Linter	3m 32s
Build	1m 32s
Unit tests (ubuntu-latest)	1m 25s
Unit tests (windows-latest)	2m 47s
E2E tests (macos-latest)	9m 44s
Integration tests (macos-latest)	2m 15s
Unit tests (macos-latest)	3m 25s
E2E tests (windows-latest)	16m 14s
Integration tests (ubuntu-latest)	1m 39s
Integration tests (windows-latest)	3m 55s
E2E tests (ubuntu-latest)	7m 50s
	55m 9s

Provide feedback