Add note in documentation and add warning related to retries parameter used without until (#28078)

docs/docsite/rst/playbooks_loops.rst

@@ -449,6 +449,8 @@ been retried for 5 times with a delay of 10 seconds. The default value for "retr
 The task returns the results returned by the last task run. The results of individual retries can be viewed by -vv option.
 The registered variable will also have a new key "attempts" which will have the number of the retries for the task.
 
+.. note:: If "until" parameter isn't defined, the value for "retries" is forced to 1.
+
 .. _with_first_found:
 
 Finding First Matched Files

lib/ansible/executor/task_executor.py

@@ -509,6 +509,7 @@ class TaskExecutor:
                 retries += 1
         else:
             retries = 1
+            display.warning("The parameter 'retries' hasn't been defined, the value for 'retries' is forced to 1.")
 
         delay = self._task.delay
         if delay < 0: