Merge branch 'bw-split-sanitize-filter' into 'master'

Move link sanitization to it’s own banzai filter

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/164003



Merged-by: Ravi Kumar <rkumar@gitlab.com>
Approved-by: Janis Altherr <jaltherr@gitlab.com>
Approved-by: Ravi Kumar <rkumar@gitlab.com>
Reviewed-by: Brett Walker <bwalker@gitlab.com>
Reviewed-by: Janis Altherr <jaltherr@gitlab.com>
Co-authored-by: Brett Walker <bwalker@gitlab.com>