Pipe & Load: Enable SQL load with "load-with-mods" param & Fixed the bug that mods is not deleted in load tsFile when there are exceptions & Fixed the potential NPE in air gap agent close() method

Pipe & Load: Enable SQL load with "load-with-mods" param & Fixed the bug that mods is not deleted in load tsFile when there are exceptions & Fixed the potential NPE in air gap agent close() method #3831