[IMP] warehouse_id:readonly except draft and sent state

- Task: https://www.odoo.com/web/#id=8339&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.qXk0qPfHkEXUB9oJ

Hi,
     The work is done related to specification.
- warehouse is working readonly here in states excepr draft and sent.