[MIG] website_blog: new api migration

- Task: https://www.odoo.com/web?debug=#id=9783&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.gSXNQBNaLZL5Ausm
hello @tde-banana-odoo , we Have directly passes the record set in  _get_discussion_detail instead of ids, I Think It's Better to Directly pass recordset (so No need To browse it again in _get_discussion_detail), IF count Then return Len(recordset) Else return the  _get_discussion_detail method and pass the REcordset in it. Is it ok or I need to  search using Count and pass ids Again Borowse in _get_discussion_detail??