[BUG] Support submits spark pipeline with reference component (Azure#27619)

* update

* update msg

Co-authored-by: Ying Chen <[email protected]>

Author: YingChen1996

sdk/ml/azure-ai-ml/azure/ai/ml/entities/_job/spark_job_entry_mixin.py

@@ -39,8 +39,13 @@ def entry(self, value: Union[Dict[str, str], SparkJobEntry, None]):
         self._entry = value
 
     def _validate_entry(self):
+        if self.entry is None:
+            # Entry is a required field for local component and when we load a remote job, component now is an arm_id,
+            # entry is from node level returned from service. Entry is only None when we reference an existing
+            # component with a function and the referenced component is in remote with name and version.
+            return
         if not isinstance(self.entry, SparkJobEntry):
-            msg = "Entry is a required field."
+            msg = f'Unsupported type {type(self.entry)} detected when validate entry, entry should be SparkJobEntry.'
             raise ValidationException(
                 message=msg,
                 no_personal_data_message=msg,