Fix mail import gmail driver when message has been deleted (#9546)

We forgot to ignore messages that were removed

packages/twenty-server/src/modules/messaging/message-import-manager/drivers/gmail/services/gmail-get-messages.service.ts

@@ -81,6 +81,8 @@ export class GmailGetMessagesService {
           response.error,
           messageIds[index],
         );
+
+        return undefined;
       }
 
       return parseAndFormatGmailMessage(