[CI] Add multi-node test case for a2 (#3805)

### What this PR does / why we need it?
This patch add multi-node test case for a2
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.11.0rc3
- vLLM main:
c9461e05a4

---------

Signed-off-by: wangli <wangli858794774@gmail.com>

.github/workflows/vllm_ascend_test_nightly_a3.yaml

@@ -104,10 +104,10 @@ jobs:
     uses: ./.github/workflows/_e2e_nightly_multi_node.yaml
     with:
       soc_version: a3
+      runner: linux-aarch64-a3-0
       image: m.daocloud.io/quay.io/ascend/cann:8.2.rc1-a3-ubuntu22.04-py3.11
       replicas: 1
       size: ${{ matrix.test_config.size }}
       config_file_path: ${{ matrix.test_config.config_file_path }}
     secrets:
       KUBECONFIG_B64: ${{ secrets.KUBECONFIG_B64 }}
-