### Motivation ### Feature flags `work_items_project_issues_list` instructs the project issues page to load the Work Items List app, rather than the legacy issues list app. WARNING: `work_item_planning_view` will prevent you from visiting the proper issues list and you'll visit the consolidated list instead. ### Rollout Plan * [x] @vjain-gl - Switch `work_items_project_issues_list` for internal actors (gitlab-org) * [x] @mdangelo6 Monitoring plan (performance, errors), so our error budgets don’t drop * https://log.gprd.gitlab.net/app/dashboards#/view/374d43f4-6ef9-47f6-a17a-4a999e127d66?_g=h@9ee772b * https://gitlab.enterprise.slack.com/archives/C097DND8CFQ * https://gitlab.enterprise.slack.com/archives/C099H3QRELS * [x] Gradual rollout plan, for the `work_items_project_issues_list` feature flag * [x] 10 % - 8th Sep @vjain-gl * [x] 25 % - 9th Sep @vjain-gl * [x] 50 % - 10th Sep @vjain-gl * [x] 100 % - 11th Sep @vjain-gl * [x] @mdangelo6 [Default enable](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/204139) in %"18.4" - 12th Sep * [x] Announcements - sync up with Amanda * TBD * [ ] Clean up %"18.5" * [x] remove the feature flags * [ ] remove the legacy code