Capture sentry error if update page api is called without an id

app/client/src/sagas/PageSagas.tsx

@@ -659,6 +659,17 @@ export function* createPageSaga(
 export function* updatePageSaga(action: ReduxAction<UpdatePageRequest>) {
   try {
     const request: UpdatePageRequest = action.payload;
+
+    // Update page *needs* id to be there. We found certain scenarios
+    // where this was not happening and capturing the error to know gather
+    // more info: https://github.com/appsmithorg/appsmith/issues/16435
+    if (!request.id) {
+      Sentry.captureException(
+        new Error("Attempting to update page without page id"),
+      );
+      return;
+    }
+
     // to be done in backend
     request.customSlug = request.customSlug?.replaceAll(" ", "-");