Merge branch '458241-rte-suggestion-fix' into 'master'

Fix code suggestions and diagrams in rich text

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/152213



Merged-by: Dheeraj Joshi <djoshi@gitlab.com>
Approved-by: Dheeraj Joshi <djoshi@gitlab.com>
Co-authored-by: Himanshu Kapoor <hkapoor@gitlab.com>