[lldb][Windows] Re-enable `unittests/tools/lldb-server/tests/LLGSTest.cpp`

[charles-zablit]

This test is running upstream, it should be re-enabled in swiftlang as well.

https://github.com/llvm/llvm-project/blob/d8b7da91eb8d8c2232c58a9f8b9f2136861da343/lldb/unittests/tools/lldb-server/tests/LLGSTest.cpp#L18