Add "Imported" text to User profile activity

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/150485



Merged-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Approved-by: Eugenia Grieff <egrieff@gitlab.com>
Approved-by: Nataliia Radina <nradina@gitlab.com>
Approved-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Reviewed-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Co-authored-by: Justin Ho Tuan Duong <hduong@gitlab.com>