@grafana/ui: Replace various icons using Icon component (#23442)

* Replace icons in dashboard and settings

* Replace icons in alerting

* Update batch of icons

* Implement icons accross various files

* Style updates

* Search: Fix recent and starred icons

* Update styling and details

* Replace new icon created by unicons

* Fix e2e test, styling

* Minor styling updates

Co-authored-by: Clarity-89 <homes89@ukr.net>

public/app/plugins/datasource/postgres/query_ctrl.ts

@@ -197,7 +197,7 @@ export class PostgresQueryCtrl extends QueryCtrl {
       appEvents.emit(CoreEvents.showConfirmModal, {
         title: 'Warning',
         text2: 'Switching to query builder may overwrite your raw SQL.',
-        icon: 'fa-exclamation',
+        icon: 'exclamation-triangle',
         yesText: 'Switch',
         onConfirm: () => {
           this.target.rawQuery = !this.target.rawQuery;