Merge branch '455112-nw-migrate-summarize-prompts' into 'master'

Migration of summarize comments tool to Claude 3

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/151392



Merged-by: Heinrich Lee Yu <heinrich@gitlab.com>
Approved-by: Lesley Razzaghian <lrazzaghian@gitlab.com>
Approved-by: Heinrich Lee Yu <heinrich@gitlab.com>
Reviewed-by: Heinrich Lee Yu <heinrich@gitlab.com>
Co-authored-by: Nathan Weinshenker <nweinshenker@gitlab.com>
Co-authored-by: Małgorzata Ksionek <mksionek@gitlab.com>