Migrate `ee/app/assets/javascripts/analytics/code_review_analytics/store/index.js` to Pinia
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=555286) </details> <!--IssueSummary end--> [`ee/app/assets/javascripts/analytics/code_review_analytics/store/index.js`](https://gitlab.com/gitlab-org/gitlab/blob/3e60bba206715737ac53d6e50fea4b76a425b6d6/ee/app/assets/javascripts/analytics/code_review_analytics/store/index.js) store should be migrated to Pinia using [the multi-step migration](https://docs.gitlab.com/development/fe_guide/pinia/#multi-step-migration). Files to cover (non-exhaustive): - `ee/app/assets/javascripts/analytics/code_review_analytics/store/index.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/store/actions.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/store/modules/merge_requests/index.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/store/modules/merge_requests/actions.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/store/modules/merge_requests/mutations.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/store/modules/merge_requests/state.js` - `app/assets/javascripts/vue_shared/components/filtered_search_bar/store/modules/filters/index.js` - `app/assets/javascripts/vue_shared/components/filtered_search_bar/store/modules/filters/actions.js` - `app/assets/javascripts/vue_shared/components/filtered_search_bar/store/modules/filters/mutations.js` - `app/assets/javascripts/vue_shared/components/filtered_search_bar/store/modules/filters/state.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/code_review_analytics_bundle.js` - `ee/app/assets/javascripts/analytics/code_review_analytics/components/filter_bar.vue` - `ee/app/assets/javascripts/analytics/code_review_analytics/components/app.vue` - `ee/app/assets/javascripts/analytics/code_review_analytics/components/merge_request_table.vue` And their respective specs.
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