Merge branch '437783-add-rest-api-update-pages-settings' into 'master'

Add REST API to update pages settings

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/147227



Merged-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Approved-by: drew stachon <730684-drew@users.noreply.gitlab.com>
Reviewed-by: Kassio Borges <kborges@gitlab.com>
Reviewed-by: Evan Read <eread@gitlab.com>
Reviewed-by: Naman Jagdish Gala <ngala@gitlab.com>
Co-authored-by: Justin Zeng <hi.justinzeng@gmail.com>