[CI][Flacky] TestList/BLMPOP_test_blocked_served_bothKey_FIFO_countOver_LEFT failed

### Search before asking

- [X] I had searched in the [issues](https://github.com/apache/kvrocks/issues) and found no similar issues.

### Version

```
--- FAIL: TestList (90.51s)
--- FAIL: TestList/BLMPOP_test_blocked_served_bothKey_FIFO_countOver_LEFT#03 (0.20s)
tcp_client.go:73:
Error Trace: /home/runner/work/kvrocks/kvrocks/tests/gocase/util/tcp_client.go:73
/home/runner/work/kvrocks/kvrocks/tests/gocase/util/tcp_client.go:100
/home/runner/work/kvrocks/kvrocks/tests/gocase/unit/type/list/list_test.go:1525
Error: Not equal:
expected: "blmpop-list2"
actual : "blmpop-list1"

Diff:
--- Expected
+++ Actual
@@ -1 +1 @@
-blmpop-list2
+blmpop-list1
Test: TestList/BLMPOP_test_blocked_served_bothKey_FIFO_countOver_LEFT#03
FAIL
```

See: https://github.com/apache/kvrocks/actions/runs/11444706001/job/31841260069?pr=2615

### Minimal reproduce step

https://github.com/apache/kvrocks/actions/runs/11444706001/job/31841260069?pr=2615

### What did you expect to see?

Pass

### What did you see instead?

See above

### Anything Else?

no

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start with tests/gocase/unit/type/list/list_test.go around line 1525 and the failure path in tests/gocase/util/tcp_client.go. Reproduce the BLMPOP_test_blocked_served_bothKey_FIFO_countOver_LEFT case from the linked CI run, then investigate why the expected and actual list keys differ; done means the test passes reliably with the expected FIFO result.

Written by the indexing model from the issue text.