[fix](be-ut) fix compile warning: declaration shadows a local variable (

#45204)

### What problem does this PR solve?
Problem Summary:
```text
FAILED: src/vec/CMakeFiles/Vec.dir/sink/writer/vtablet_writer.cpp.o
/root/doris/be/src/vec/sink/writer/vtablet_writer.cpp:1402:23: error: declaration shadows a local variable [-Werror,-Wshadow]
    } else if (Status st = ich.check_tablet_filtered_rows_consistency(); !st.ok()) {
/root/doris/be/src/vec/sink/writer/vtablet_writer.cpp:1400:23: note: previous declaration is here
    } else if (Status st = ich.check_tablet_received_rows_consistency(); !st.ok()) {
```

be/src/vec/sink/writer/vtablet_writer.cpp

@@ -1394,13 +1394,12 @@ static Status cancel_channel_and_check_intolerable_failure(Status status,
     nch.cancel(err_msg);
 
     // check if index has intolerable failure
-    Status index_st = ich.check_intolerable_failure();
-    if (!index_st.ok()) {
+    if (Status index_st = ich.check_intolerable_failure(); !index_st.ok()) {
         status = std::move(index_st);
-    } else if (Status st = ich.check_tablet_received_rows_consistency(); !st.ok()) {
-        status = std::move(st);
-    } else if (Status st = ich.check_tablet_filtered_rows_consistency(); !st.ok()) {
-        status = std::move(st);
+    } else if (Status receive_st = ich.check_tablet_received_rows_consistency(); !receive_st.ok()) {
+        status = std::move(receive_st);
+    } else if (Status filter_st = ich.check_tablet_filtered_rows_consistency(); !filter_st.ok()) {
+        status = std::move(filter_st);
     }
     return status;
 }