Merge branch 'ai_agents/fix_send_message_request' into 'master'

Fixes agent version being created with wrong id

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/148247



Merged-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Approved-by: Kos Palchyk <kpalchyk@gitlab.com>
Approved-by: Darby Frey <dfrey@gitlab.com>
Approved-by: Olena Horal-Koretska <ohoralkoretska@gitlab.com>
Reviewed-by: Eduardo Bonet <ebonet@gitlab.com>
Co-authored-by: Eduardo Bonet <ebonet@gitlab.com>