Move the "Review-response SLO" section to the handbook
What does this MR do and why?
The Review-response
SLO is company-specific, so it makes more sense to move it to the relevant handbook page (namely https://about.gitlab.com/handbook/engineering/workflow/code-review/).
Corresponding gitlab-com/www-gitlab-com
is at gitlab-com/www-gitlab-com!109501 (merged).
Edited by Rémy Coutable