Revert "Tests: Speed up RunCMake.include_directories test"

This reverts commit 00fefc496ce7ac797a1c09caa845b9f1baef7514.
It will be revised.
Merge topic 'test-speedup-RunCMake.include_directories' into next

b4170782 Revert "Tests: Speed up RunCMake.include_directories test"