Merge branch 'dc/10842-confidential' into 'master'

Add cut-off date for summarize_comments

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/167221



Merged-by: Nikola Milojevic <nmilojevic@gitlab.com>
Approved-by: Nikola Milojevic <nmilojevic@gitlab.com>
Co-authored-by: Donald Cook <dcook@gitlab.com>