[lldb][mcp] Skip MCPUnixSocketCommandTestCase if remote (llvm#146807)

It looks like llvm#146603 broke the
[lldb-remote-linux-win](https://lab.llvm.org/buildbot/#/builders/197)
build bot because `MCPUnixSocketCommandTestCase` is trying to start a
protocol-server via unix domain sockets on windows.
This change makes it so the test is skipped if it is remote.

Author: aperez

lldb/test/API/commands/protocol/TestMCPUnixSocket.py

@@ -12,6 +12,7 @@
 
 class MCPUnixSocketCommandTestCase(TestBase):
     @skipIfWindows
+    @skipIfRemote
     @no_debug_info_test
     def test_unix_socket(self):
         """