[Test] Add nightly test for DeepSeek-V3.2-Exp (#3908)

### What this PR does / why we need it?
Add nightly test for DeepSeek-V3.2-Exp


### How was this patch tested?
test action：

https://github.com/vllm-project/vllm-ascend/actions/runs/19156153634/job/54757008557?pr=3908


- vLLM version: v0.11.0
- vLLM main:
83f478bb19

---------

Signed-off-by: hfadzxy <starmoon_zhang@163.com>

.github/workflows/vllm_ascend_test_nightly_a3.yaml

@@ -84,12 +84,16 @@ jobs:
           - name: qwen3-235b-w8a8
             os: linux-aarch64-a3-16
             tests: tests/e2e/nightly/models/test_qwen3_235b_w8a8.py
+          - name: deepseek3_2-exp-w8a8
+            os: linux-aarch64-a3-16
+            tests: tests/e2e/nightly/models/test_deepseek_v3_2_exp_w8a8.py
     uses: ./.github/workflows/_e2e_nightly_single_node.yaml
     with:
       vllm: v0.11.0
       runner: ${{ matrix.test_config.os }}
       image: swr.cn-southwest-2.myhuaweicloud.com/base_image/ascend-ci/cann:8.3.rc1-a3-ubuntu22.04-py3.11
       tests: ${{ matrix.test_config.tests }}
+      name: ${{ matrix.test_config.name }}
 
   multi-node-tests:
     name: multi-node
@@ -115,6 +119,9 @@ jobs:
           - name: multi-node-glm-2node
             config_file_path: GLM-4_5.yaml
             size: 2
+          - name: multi-node-dpsk3.2-exp-2node
+            config_file_path: DeepSeek-V3_2-Exp-bf16.yaml
+            size: 2
     uses: ./.github/workflows/_e2e_nightly_multi_node.yaml
     with:
       soc_version: a3