cabal-install vcs unit tests fails in windows with permission denied

[jneira]

• As we can see in this workflow run:

The file will have its original line endings in your working directory
      cloneSourceRepo:                                                          FAIL (66.75s)
        *** Failed! Exception: 'C:\Users\RUNNER~1\AppData\Local\Temp\vcstest-6732\src\.git\modules\file\D\objects\db\9ec9568e23890c815712379a245857e65192ec: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:DeleteFile "\\\\?\\C:\\Users\\RUNNER~1\\AppData\\Local\\Temp\\vcstest-6732\\src\\.git\\modules\\file\\D\\objects\\db\\9ec9568e23890c815712379a245857e65192ec": permission denied (Access is denied.)' (after 2 tests and 8 shrinks):
        BranchingRepoRecipe [Right (BranchCommits "branch_C" [Commit [Right (SubmoduleAdd "file\\D" "cdpkiuvbknymnqyoiyxp" (Commit [Left (FileUpdate "file\\A" "Rb$7+,I'[N"),Left (FileUpdate "file\\A" "G{'9.-q%2G")]))]])]
        Use --quickcheck-replay=600337 to reproduce.
        Use -p '/git.cloneSourceRepo/' to rerun this test only.
      syncSourceRepos:                                                          FAIL (2.83s)
        *** Failed! Exception: 'C:\Users\RUNNER~1\AppData\Local\Temp\vcstest-6732\src\.git\modules\file\E\objects\fe\a0da7bebd3deee9ff959934825f83b5ede3caa: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:DeleteFile "\\\\?\\C:\\Users\\RUNNER~1\\AppData\\Local\\Temp\\vcstest-6732\\src\\.git\\modules\\file\\E\\objects\\fe\\a0da7bebd3deee9ff959934825f83b5ede3caa": permission denied (Access is denied.)' (after 1 test):
        RepoDirSet 1
        SyncTargetIterations 1
        PrngSeed 3398131536012000399
        BranchingRepoRecipe [Right (BranchCommits "branch_A" [Commit [Right (SubmoduleAdd "file\\E" "tncvrbtaqxracaiobnbq" (Commit [Left (FileUpdate "file\\E" "/AqOh;_hK/")]))]])]
        Use --quickcheck-replay=16356 to reproduce.
        Use -p '/git.syncSourceRepos/' to rerun this test only.

• Even for newer ghc versions: 8.10.7 in the example
• Set -j1 does not help

[jneira]

Maybe the ci test error reveals this bug: #6933

[jasagredo]

Closing in favor of #10182