[misc] CI hygiene: enforce __main__ entry, drop silent-skipped tests, fix rerun-test protoc (#23305)

test/registered/debug_utils/source_patcher/test_code_patcher.py

@@ -254,3 +254,9 @@ class TestCodePatcher:
                 raise RuntimeError("test error")
 
         assert obj.greet("world") == "hello world"
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(pytest.main([__file__, "-v"]))

test/registered/debug_utils/source_patcher/test_dumper_integration.py

@@ -55,3 +55,11 @@ class TestDumperApplySourcePatches:
             cls.greet.__code__ = original_code
 
         assert obj.greet("world") == "hello world"
+
+
+if __name__ == "__main__":
+    import sys
+
+    import pytest
+
+    sys.exit(pytest.main([__file__, "-v"]))

test/registered/debug_utils/source_patcher/test_source_editor.py

@@ -290,3 +290,9 @@ class TestApplyEdits:
         ]
         result = apply_edits(source=source, edits=edits)
         assert result == ("def foo():\n" "    x = 1\n" "    y = 20\n" "    return x\n")
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(pytest.main([__file__, "-v"]))