Merge branch '468265-design-widget-display-existing-comments-pins' into 'master'

Work item designs - Display existing note pins

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/163875



Merged-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Approved-by: Rajan Mistry <rmistry@gitlab.com>
Approved-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Reviewed-by: Natalia Tepluhina <ntepluhina@gitlab.com>
Co-authored-by: Florie Guibert <fguibert@gitlab.com>