partners[lint]: run pyupgrade to get code in line with 3.9 standards (#30781)

Using `pyupgrade` to get all `partners` code up to 3.9 standards
(mostly, fixing old `typing` imports).

libs/partners/prompty/scripts/check_imports.py

@@ -10,8 +10,6 @@ if __name__ == "__main__":
             SourceFileLoader("x", file).load_module()
         except Exception:
             has_faillure = True
-            print(file)
             traceback.print_exc()
-            print()
 
     sys.exit(1 if has_failure else 0)