Add e2e Testing for free threaded and Bump @action/cache from 4.0.0 to 4.0.3 (#1056)

* include freethread e2e testing and upgrade cache from 4.0.0 to 4.0.2

* include verify gil step and validated python version

* Rename files

* include ubuntu-arm runners for testing

__tests__/verify-freethreaded.py

@@ -0,0 +1,3 @@
+import sys
+if __name__ == '__main__':
+    print(f"Using GIL: {sys._is_gil_enabled()}\n")