[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_a2.yaml

@@ -61,3 +61,25 @@ jobs:
       vllm: v0.11.0
       runner: ${{ matrix.test_config.os }}
       tests: ${{ matrix.test_config.tests }}
+
+  multi-node-tests:
+    needs: single-node-tests
+    if: always() && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch')
+    strategy:
+      fail-fast: false
+      max-parallel: 1
+      matrix:
+        test_config:
+          - name: multi-node-deepseek-dp
+            config_file_path: tests/e2e/nightly/multi_node/config/models/DeepSeek-R1-W8A8-A2.yaml
+            size: 2
+    uses: ./.github/workflows/_e2e_nightly_multi_node.yaml
+    with:
+      soc_version: a2
+      runner: linux-aarch64-a2-0
+      image: swr.cn-southwest-2.myhuaweicloud.com/base_image/ascend-ci/cann:8.2.rc1-910b-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_A2_B64 }}