Flaky Windows test

[pepeiborra]

The test "lower-case drive" fails randomly in Windows

ghcide
  diagnostics
    lower-case drive: FAIL (2.55s)
      test\exe\Main.hs:551:
      Got unexpected diagnostics for Uri {getUri = "file:///C:/Users/runneradmin/AppData/Local/Temp/extra-dir-816443890125/A/A.hs"} got List [Diagnostic {_range = Range {_start = Position {_line = 0, _character = 0}, _end = Position {_line = 1, _character = 0}}, _severity = Just DsError, _code = Nothing, _source = Just "compiler", _message = "C:\\Users\\runneradmin\\AppData\\Local\\Temp\\extra-dir-816443890125\\A\\A.hs: getModificationTime:CreateFile \"\\\\\\\\?\\\\C:\\\\Users\\\\runneradmin\\\\AppData\\\\Local\\\\Temp\\\\extra-dir-816443890125\\\\A\\\\A.hs\": does not exist (The system cannot find the file specified.)", _tags = Nothing, _relatedInformation = Nothing}]

[jneira]

I've added it to the list in #2153 so we can close this one, if you agree