As per discussion [here](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184128#note_2400243340), we would like to rename `Resolvers::WorkItems::Widgets::StatusResolver` to `Resolvers::WorkItems::Widgets::AllowedStatusesResolver`. It would make it easier to distinguish between `Resolvers::WorkItems::Widgets::AllowedStatusesResolver` and `Resolvers::WorkItems::BulkStatusResolver`.