Fix sa 2.0.44 compatibility

Author: vgvoleg

ydb_sqlalchemy/sqlalchemy/dbapi_adapter.py

@@ -67,6 +67,8 @@ def get_table_names(self):
 
 
 class AdaptedAsyncCursor:
+    _awaitable_cursor_close: bool = False
+
     def __init__(self, cursor: AsyncCursor):
         self._cursor = cursor
 
@@ -112,3 +114,7 @@ def setinputsizes(self, *args):
 
     def setoutputsizes(self, *args):
         pass
+
+    async def _async_soft_close(self) -> None:
+        # TODO(vgvoleg): Migrate to AsyncAdapt_dbapi_cursor and AsyncAdapt_dbapi_connection
+        pass