Merge branch 'refactor-avatars' into 'master'

Avatar: Refactor to use gl-avatar

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/163899



Merged-by: Anna Vovchenko <avovchenko@gitlab.com>
Approved-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Approved-by: Minahil Nichols <minahilnichols@gitlab.com>
Approved-by: Anna Vovchenko <avovchenko@gitlab.com>
Approved-by: Kevin Morrison <kmorrison@gitlab.com>
Reviewed-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Reviewed-by: Anna Vovchenko <avovchenko@gitlab.com>
Reviewed-by: Sascha Eggenberger <seggenberger@gitlab.com>
Co-authored-by: Sascha Eggenberger <seggenberger@gitlab.com>