[CI][1/N] Add basic ci for PD disaggregation (#830)

### What this PR does / why we need it?
Add basic CI for PD disaggregation, and enable it when schedule and
label with `module:pd`

- Updated `.github/actionlint.yaml` to add a new self-hosted runner
configuration: `linux-arm64-npu-static-8`.
- Introduced a new GitHub Actions workflow
`.github/workflows/vllm_ascend_test_pd.yaml` for PD disaggregation
testing:
- Scheduled to run daily at 23:00 UTC and triggered by pull request
label `module:pd`.
- Added steps for baisci installation and other steps will add in
followup PR

Related: https://github.com/vllm-project/vllm-ascend/issues/841

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
- CI passed
- No trigger by default
<img width="847" alt="image"
src="https://github.com/user-attachments/assets/23aa128f-526d-447f-91c8-8ebf6be8400f"
/>
- Trigger only if we tag with pd
<img width="930" alt="image"
src="https://github.com/user-attachments/assets/aef1caca-2029-48e8-a6e6-860136adcd37"
/>

Signed-off-by: Yikun Jiang <yikunkero@gmail.com>

.github/actionlint.yaml

@@ -4,3 +4,4 @@ self-hosted-runner:
     - linux-arm64-npu-1
     - linux-arm64-npu-2
     - linux-arm64-npu-4
+    - linux-arm64-npu-static-8

.github/workflows/vllm_ascend_test_pd.yaml

@@ -0,0 +1,102 @@
+#
+# Copyright (c) 2025 Huawei Technologies Co., Ltd. All Rights Reserved.
+# This file is a part of the vllm-ascend project.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+name: 'e2e test / pd-disaggregation'
+
+on:
+  schedule:
+    # Runs at 23:00 UTC (7:00 AM Beijing) every day
+    - cron: '0 23 * * *'
+  pull_request:
+    types: [ labeled ]
+
+# Bash shells do not use ~/.profile or ~/.bashrc so these shells need to be explicitly
+# declared as "shell: bash -el {0}" on steps that need to be properly activated.
+# It's used to activate ascend-toolkit environment variables.
+defaults:
+  run:
+    shell: bash -el {0}
+
+jobs:
+  test:
+    if: ${{ github.event.label.name == 'module:pd' }}
+    strategy:
+      matrix:
+        vllm_verison: [v0.8.5.post1]
+    name: vLLM Ascend test
+    runs-on: linux-arm64-npu-static-8
+
+    container:
+      image: m.daocloud.io/quay.io/ascend/cann:8.1.rc1-910b-ubuntu22.04-py3.10
+      volumes:
+        - /usr/local/dcmi:/usr/local/dcmi
+        - /usr/local/bin/npu-smi:/usr/local/bin/npu-smi
+        - /usr/local/Ascend/driver/:/usr/local/Ascend/driver/
+        # Use self-host cache speed up pip and model download
+        - /home/action/.cache:/github/home/.cache/
+      options: >-
+        --device /dev/davinci0
+        --device /dev/davinci1
+        --device /dev/davinci2
+        --device /dev/davinci3
+        --device /dev/davinci4
+        --device /dev/davinci5
+        --device /dev/davinci6
+        --device /dev/davinci7
+        --device /dev/davinci_manager
+        --device /dev/devmm_svm
+        --device /dev/hisi_hdc
+      env:
+        HF_ENDPOINT: https://hf-mirror.com
+        HF_TOKEN: ${{ secrets.HF_TOKEN }}
+    steps:
+      - name: Check npu and CANN info
+        run: |
+          npu-smi info
+          cat /usr/local/Ascend/ascend-toolkit/latest/"$(uname -i)"-linux/ascend_toolkit_install.info
+
+      - name: Config mirrors
+        run: |
+          sed -i 's|ports.ubuntu.com|mirrors.tuna.tsinghua.edu.cn|g' /etc/apt/sources.list
+          pip config set global.index-url https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple
+          apt-get update -y
+          apt install git -y
+          git config --global url."https://gh-proxy.test.osinfra.cn/https://github.com/".insteadOf https://github.com/
+
+      - name: Checkout vllm-project/vllm-ascend repo
+        uses: actions/checkout@v4
+
+      - name: Install system dependencies
+        run: |
+          apt-get -y install `cat packages.txt`
+          apt-get -y install gcc g++ cmake libnuma-dev
+
+      - name: Checkout vllm-project/vllm repo
+        uses: actions/checkout@v4
+        with:
+          repository: vllm-project/vllm
+          ref: ${{ matrix.vllm_verison }}
+          path: ./vllm-empty
+
+      - name: Install vllm-project/vllm from source
+        working-directory: ./vllm-empty
+        run: |
+          VLLM_TARGET_DEVICE=empty pip install -e .
+
+      - name: Install vllm-project/vllm-ascend
+        run: |
+          pip install -r requirements-dev.txt
+          pip install -v -e .