Add `gitlab_ui_radio_component` custom field to GitLab UI form builder
In !64260 (merged) we added a GitLab UI form builder and added the gitlab_ui_checkbox_component field. We should also add a gitlab_ui_radio_component for radio buttons.
In !64260 (merged) we added a GitLab UI form builder and added the gitlab_ui_checkbox_component field. We should also add a gitlab_ui_radio_component for radio buttons.