[PM-6511] New i18n for angular (#8122)

* Use state provider to store preferred language

* migrate preferred language

* Use new i18n provider to get LOCAL_ID

* Fix preloaded english i18n

This is a mock service that forces english translations, it doesn't need the i18n interface that allows changing of locales.

* PR improvements

* Fixup merge

libs/components/src/utils/i18n-mock.service.ts

@@ -34,4 +34,8 @@ export class I18nMockService implements I18nService {
   translate(id: string, p1?: string, p2?: string, p3?: string) {
     return this.t(id, p1, p2, p3);
   }
+
+  async setLocale(locale: string): Promise<void> {
+    throw new Error("Method not implemented.");
+  }
 }