Update the logging level as this is supposed to be a warning (#34504)

* Update the logging level as this is supposed to be a warning

* Update _connection_async.py to warning instead of error logging level

sdk/servicebus/azure-servicebus/azure/servicebus/_pyamqp/_connection.py

@@ -516,7 +516,7 @@ def _incoming_close(self, channel: int, frame: Tuple[Any, ...]) -> None:
             self._error = AMQPConnectionError(
                 condition=frame[0][0], description=frame[0][1], info=frame[0][2]
             )
-            _LOGGER.error(
+            _LOGGER.warning(
                 "Connection closed with error: %r", frame[0],
                 extra=self._network_trace_params
             )

sdk/servicebus/azure-servicebus/azure/servicebus/_pyamqp/aio/_connection_async.py

@@ -533,7 +533,7 @@ async def _incoming_close(self, channel: int, frame: Tuple[Any, ...]) -> None:
             self._error = AMQPConnectionError(
                 condition=frame[0][0], description=frame[0][1], info=frame[0][2]
             )
-            _LOGGER.error(
+            _LOGGER.warning(
                 "Connection closed with error: %r", frame[0],
                 extra=self._network_trace_params
             )