Some tests fail when using `lldb-server.exe` and pass when using the in process plugin and vice-versa. This patch adds the `skipIfWindowsAndNoLLDBServer` and `expectedFailureWindowsAndNoLLDBServer` decorators (and their opposites) to only skip tests if they run on `lldb-server` or the in process plugin. This fixes 4 XPASS when running tests with `USE_LLDB_SERVER=1`. rdar://179117754