Improve handling of DOE messages in backups

Co-authored-by: trevor-signal <131492920+trevor-signal@users.noreply.github.com>

ts/services/backups/export.ts

@@ -1078,7 +1078,7 @@ export class BackupExportStream extends Readable {
         message,
         backupLevel,
       });
-    } else if (message.isErased) {
+    } else if (message.deletedForEveryone) {
       result.remoteDeletedMessage = {};
     } else if (messageHasPaymentEvent(message)) {
       const { payment } = message;

ts/services/backups/import.ts

@@ -1891,6 +1891,7 @@ export class BackupImportStream extends Writable {
       return {
         message: {
           isErased: true,
+          deletedForEveryone: true,
         },
         additionalMessages: [],
       };

ts/test-electron/backup/non_bubble_test.ts

@@ -405,6 +405,7 @@ describe('backup/non-bubble messages', () => {
         seenStatus: SeenStatus.Unseen,
         unidentifiedDeliveryReceived: true,
         isErased: true,
+        deletedForEveryone: true,
       },
     ]);
   });