Merge branch '438906-design-management-move-todo-button-from-sidebar-to-top-bar' into 'master'

Design management - Move todo button

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145736



Merged-by: Coung Ngo <cngo@gitlab.com>
Approved-by: Coung Ngo <cngo@gitlab.com>
Approved-by: Rajan Mistry <rmistry@gitlab.com>
Reviewed-by: Rajan Mistry <rmistry@gitlab.com>
Co-authored-by: Florie Guibert <fguibert@gitlab.com>