Merge branch '469653-vulnerability-code-flow-P3' into 'master'

Add the left side of 'code flow' that including description and steps

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/158512



Merged-by: Mireya Andres <mandres@gitlab.com>
Approved-by: Sharmad Nachnolkar <snachnolkar@gitlab.com>
Approved-by: Mireya Andres <mandres@gitlab.com>
Reviewed-by: Mireya Andres <mandres@gitlab.com>
Reviewed-by: Sharmad Nachnolkar <snachnolkar@gitlab.com>
Reviewed-by: Chen Charnolevsky <ccharnolevsky@gitlab.com>
Co-authored-by: Chen Charnolevsky <ccharnolevsky@gitlab.com>