Improving validation of task retries to handle None values (apache#42532

)

* Improving validation of task retries to handle None values

* Updated the validation check to use the "or" logical operator

Co-authored-by: Jens Scheffler <95105677+jscheffl@users.noreply.github.com>

* Added a comment for the new validation check

* Update baseoperator.py

* Update taskinstance.py

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Co-authored-by: Jens Scheffler <95105677+jscheffl@users.noreply.github.com>

airflow/models/baseoperator.py

@@ -127,7 +127,9 @@
 
 
 def parse_retries(retries: Any) -> int | None:
-    if retries is None or type(retries) == int:  # noqa: E721
+    if retries is None:
+        return 0
+    elif type(retries) == int:  # noqa: E721
         return retries
     try:
         parsed_retries = int(retries)