sea-migration static type checking fixes

Signed-off-by: Sai Shree Pradhan <saishree.pradhan@databricks.com>

Author: saishreeeee

src/databricks/sql/backend/databricks_client.py

@@ -79,9 +79,10 @@ def execute_command(
         lz4_compression: bool,
         cursor: Cursor,
         use_cloud_fetch: bool,
-        parameters: List[ttypes.TSparkParameter],
+        parameters: Union[List[ttypes.TSparkParameter], List[Dict[str, Any]]],
         async_op: bool,
         enforce_embedded_schema_correctness: bool,
+        row_limit: Optional[int] = None,
     ) -> Union[ResultSet, None]:
         """
         Executes a SQL command or query within the specified session.

src/databricks/sql/backend/thrift_backend.py

@@ -240,10 +240,6 @@ def __init__(
     def max_download_threads(self) -> int:
         return self._max_download_threads
 
-    @property
-    def max_download_threads(self) -> int:
-        return self._max_download_threads
-
     # TODO: Move this bounding logic into DatabricksRetryPolicy for v3 (PECO-918)
     def _initialize_retry_args(self, kwargs):
         # Configure retries & timing: use user-settings or defaults, and bound