[lldb][NativePDB] Require `target-windows` for MSVC test (#186578) Fixes the failure on the lldb-remote-linux-win buildbot (https://github.com/llvm/llvm-project/pull/186124#issuecomment-4060098881). The test runs MSVC to produce an executable that only runs on Windows. GitOrigin-RevId: 1f9b32ba061e7d5f7173a6a7150faf31964c2974