Merge branch 'bojan/integrations-avatar-cleanup' into 'master'

Reuse HasAvatar concern for integrations

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/146619



Merged-by: Carla Drago <cdrago@gitlab.com>
Approved-by: Ivane Gkomarteli <igkomarteli@gitlab.com>
Approved-by: Carla Drago <cdrago@gitlab.com>
Co-authored-by: bmarjanovic <bmarjanovic@gitlab.com>