Tests for --with-repl are flaky on windows

[mpickering]

See #10996

The tests on windows fail with

D:\a\_temp\cabal-testsuite-12064\cabal-multi.dist\work\.\dist\multi-out-63884\paths\cabal-with-repl-exe-0.1.0.0-inplace-test-exe: removeDirectoryRecursive:removeContentsRecursive:removePathRecursive:removeContentsRecursive:removePathRecursive:DeleteFile "\\\\?\\D:\\a\\_temp\\cabal-testsuite-12064\\cabal-multi.dist\\work\\dist\\multi-out-63884\\paths\\cabal-with-repl-exe-0.1.0.0-inplace-test-exe": permission denied (The process cannot access the file because it is being used by another process.)

It appears the tests work fine but then the error happens during cleanup. Therefore the tests are skipped on CI on windows.