Merge branch 'activity-remove-avatars' into 'master'

Remove avatars from user profile activity

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/135038



Merged-by: Dheeraj Joshi <djoshi@gitlab.com>
Approved-by: Minahil Nichols <minahilnichols@gitlab.com>
Approved-by: Sascha Eggenberger <seggenberger@gitlab.com>
Approved-by: Dheeraj Joshi <djoshi@gitlab.com>
Reviewed-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Reviewed-by: Doug Stull <dstull@gitlab.com>
Reviewed-by: Dheeraj Joshi <djoshi@gitlab.com>
Reviewed-by: Sascha Eggenberger <seggenberger@gitlab.com>
Co-authored-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>