[lldb][test] Skip DWARF inline source file test on Windows

This was added by 917b404
and fails for unknown reasons.

Author: DavidSpickett

lldb/test/API/functionalities/inline-sourcefile/TestInlineSourceFiles.py

@@ -8,6 +8,8 @@
 class InlineSourceFilesTestCase(TestBase):
     @skipIf(compiler="gcc")
     @skipIf(compiler="clang", compiler_version=["<", "18.0"])
+    # Fails on Windows for unknown reasons.
+    @skipIfWindows
     def test(self):
         """Test DWARF inline source files."""
         self.build()