fix: pylint checks in connectors/sqla/models.py (#10974)

* Removed unused pylint rule `too-many-instance-attributes` from SqlaTable class.

* Removed unecessary rule: `bad-whitespace` from `get_sqla_query` method

* Disabling too-many-instance-attributes since it fails on CI

superset/connectors/sqla/models.py

@@ -822,7 +822,7 @@ def get_sqla_query(  # pylint: disable=too-many-arguments,too-many-locals,too-ma
         groupby: Optional[List[str]] = None,
         filter: Optional[  # pylint: disable=redefined-builtin
             List[Dict[str, Any]]
-        ] = None,  # pylint: disable=bad-whitespace
+        ] = None,
         is_timeseries: bool = True,
         timeseries_limit: int = 15,
         timeseries_limit_metric: Optional[Metric] = None,