fix no test id provided for pytest run (#22569)

fixes #22567

Now if a user tries to click the "run" button a empty folder (ie a
folder with no tests in it) it will just run pytest with no testIds as
args and notify the user.

pythonFiles/vscode_pytest/run_pytest_script.py

@@ -64,6 +64,14 @@
     try:
         if test_ids_from_buffer:
             arg_array = ["-p", "vscode_pytest"] + args + test_ids_from_buffer
+            print("Running pytest with args: " + str(arg_array))
+            pytest.main(arg_array)
+        else:
+            print(
+                "Error: No test ids received from stdin, could be an error or a run request without ids provided.",
+            )
+            print("Running pytest with no test ids as args. Args being used: ", args)
+            arg_array = ["-p", "vscode_pytest"] + args
             pytest.main(arg_array)
     except json.JSONDecodeError:
         print("Error: Could not parse test ids from stdin")