[Bugfix][LoRA] Fix the bug when runs Qwen3-Reranker-0.6B with LoRA. (#7156)

### What this PR does / why we need it?
Fix the error that reports while initializing qwen3-reranker-0.6b model
with `--enable-lora`.
And add a testcase to verify the fix.

- vLLM version: v0.17.0
- vLLM main:
4034c3d32e
---------
Signed-off-by: paulyu12 <507435917@qq.com>
Co-authored-by: Mengqing Cao <cmq0113@163.com>

.github/workflows/scripts/config.yaml

@@ -49,6 +49,8 @@ e2e-singlecard:
     estimated_time: 270
   - name: tests/e2e/singlecard/pooling/test_scoring.py
     estimated_time: 500
+  - name: tests/e2e/singlecard/pooling/test_qwen3_reranker_lora.py
+    estimated_time: 235
   - name: tests/e2e/singlecard/spec_decode/test_mtp_eagle_correctness.py
     estimated_time: 1500
   - name: tests/e2e/singlecard/spec_decode/test_v1_spec_decode.py