Use a different error message for UTDs when you weren't in the room. (#12453)

* Use different messages for UTDs sent before login

* Playwright test for historical events

* Add some tests

* initial work on pre-join UTDs

* add playwright tests and remove old pre-join UTD logic

* run i18n script

* fix type error

* use different error code in PostHog for pre-join UTD

* don't remove old pre-join UTD logic yet

---------

Co-authored-by: Richard van der Hoff <richard@matrix.org>

src/components/views/messages/DecryptionFailureBody.tsx

@@ -36,6 +36,9 @@ function getErrorMessage(mxEvent: MatrixEvent, isVerified: boolean | undefined):
             }
             // otherwise, use the default.
             break;
+
+        case DecryptionFailureCode.HISTORICAL_MESSAGE_USER_NOT_JOINED:
+            return _t("timeline|decryption_failure|historical_event_user_not_joined");
     }
     return _t("timeline|decryption_failure|unable_to_decrypt");
 }