test: introduce test_is_running_from_builddir()
    
    (cherry picked from commit 8cb10a4f4dabc508a04f76ea55f23ef517881b61)
    
    Resolves: #1823767
    
    patch_name: 0365-test-introduce-test_is_running_from_builddir.patch
    present_in_specfile: true
    location_in_specfile: 365
    squash_commits: true