Fix test_fetcher when setup is updated (#13566)

* Fix test_fetcher when setup is updated

* Remove example

utils/tests_fetcher.py

@@ -416,6 +416,10 @@ def infer_tests_to_run(output_file, diff_with_last_commit=False, filters=None):
     impacted_files = sorted(list(set(impacted_files)))
     print(f"\n### IMPACTED FILES ###\n{_print_list(impacted_files)}")
 
+    # Grab the corresponding test files:
+    if "setup.py" in impacted_files:
+        test_files_to_run = ["tests"]
+    else:
         # Grab the corresponding test files:
         test_files_to_run = []
         for f in impacted_files: