chore: move message reporting copy to localizations file (#2303)

assets/l10n/intl_en.arb

@@ -4848,5 +4848,6 @@
   "exploreMore": "Explore more",
   "wordFocusListeningMultipleChoice": "Which audio matches the word?",
   "createActivity": "Create activity",
-  "startChat": "Start a chat"
+  "startChat": "Start a chat",
+  "translationProblem": "Translation problem"
 }

lib/pangea/events/utils/report_message.dart

@@ -31,7 +31,7 @@ void reportEvent(
   final score = await showModalActionPopup<int>(
     context: context,
     title: L10n.of(context).reportMessage,
-    message: "Why do you want to report this message?",
+    message: L10n.of(context).whyDoYouWantToReportThis,
     cancelLabel: L10n.of(context).cancel,
     actions: [
       AdaptiveModalAction(
@@ -40,11 +40,11 @@ void reportEvent(
       ),
       AdaptiveModalAction(
         value: 2,
-        label: "Translation problem",
+        label: L10n.of(context).translationProblem,
       ),
       AdaptiveModalAction(
         value: 3,
-        label: "Other",
+        label: L10n.of(context).other,
       ),
     ],
   );