~frontend counterpart to https://gitlab.com/gitlab-org/gitlab/-/issues/214046 ### Implementation plan 1. Create a HAML view similar to [app/views/projects/settings/access_tokens/index.html.haml](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/projects/settings/access_tokens/index.html.haml) in `app/views/groups/settings/access_tokens`. Maybe abstract to shared partial if it makes sense. 1. Add specs similar to [spec/features/projects/settings/access_tokens_spec.rb](https://gitlab.com/gitlab-org/gitlab/-/blob/master/spec/features/projects/settings/access_tokens_spec.rb). Maybe abstract to a shared example 1. Add new nav menu item to [app/views/layouts/nav/sidebar/_group.html.haml#L170](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/layouts/nav/sidebar/_group.html.haml#L170) 1. Copy [app/assets/javascripts/pages/projects/settings/access_tokens/index.js](https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/pages/projects/settings/access_tokens/index.js) to `app/assets/javascripts/pages/groups/settings/access_tokens`