Skip _finalize_license_files in test without source tree

Author: abravalheri

setuptools/tests/test_core_metadata.py

@@ -372,6 +372,9 @@ def dist(self, request, monkeypatch, tmp_path):
         monkeypatch.chdir(tmp_path)
         monkeypatch.setattr(expand, "read_attr", Mock(return_value="0.42"))
         monkeypatch.setattr(expand, "read_files", Mock(return_value="hello world"))
+        monkeypatch.setattr(
+            Distribution, "_finalize_license_files", Mock(return_value=None)
+        )
         if request.param is None:
             yield self.base_example()
         else: