MINOR: Fix column comment getting overriden in glue (open-metadata#23329)

Author: ulixius9

ingestion/src/metadata/ingestion/source/database/athena/utils.py

@@ -173,7 +173,7 @@ def get_columns(self, connection, table_name, schema=None, **kw):
             for glue_col in glue_columns:
                 col_name = glue_col["Name"]
                 col_type = glue_col["Type"]
-                col_comment = glue_col.get("Comment", "")
+                col_comment = glue_col.get("Comment")
                 col_parameters = glue_col.get("Parameters", {})
 
                 # Check if this is a non-current Iceberg column

ingestion/src/metadata/ingestion/source/database/glue/metadata.py

@@ -406,7 +406,7 @@ def get_columns(self, column_data: StorageDetails) -> Optional[Iterable[Column]]
                 for glue_col in glue_columns:
                     col_name = glue_col["Name"]
                     col_type = glue_col["Type"]
-                    col_comment = glue_col.get("Comment", "")
+                    col_comment = glue_col.get("Comment")
                     col_parameters = glue_col.get("Parameters", {})
 
                     # Check if this is a non-current Iceberg column
@@ -427,7 +427,7 @@ def get_columns(self, column_data: StorageDetails) -> Optional[Iterable[Column]]
                 for glue_col in partition_keys:
                     col_name = glue_col["Name"]
                     col_type = glue_col["Type"]
-                    col_comment = glue_col.get("Comment", "")
+                    col_comment = glue_col.get("Comment")
                     col_parameters = glue_col.get("Parameters", {})
 
                     # Check if this is a non-current Iceberg column