fix(druid) make .list_tables() follow the standard API

This is breaking.

Author: NickCrews

ibis/backends/druid/__init__.py

@@ -226,7 +226,7 @@ def drop_table(self, *args, **kwargs):
         raise NotImplementedError()
 
     def list_tables(
-        self, like: str | None = None, database: str | None = None
+        self, *, like: str | None = None, database: str | None = None
     ) -> list[str]:
         if database is not None:
             raise NotImplementedError(