message: fix(explore): missing select when groupby without metrics
diff: @@ -967,7 +967,7 @@ class SqlaTable( # pylint: disable=too-many-public-methods,too-many-instance-at
  columns = columns or []
  columns = [col for col in columns if col != utils.DTTM_ALIAS]
  - if (is_sip_38 and metrics and columns) or (not is_sip_38 and metrics):
  + if metrics or groupby:
  # dedup columns while preserving order
  columns = columns if is_sip_38 else (groupby or columns)
  select_exprs = []
  