[Diffusion] [NPU] Add CI tests for FLUX (#19001)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: ronnie_zheng <zl19940307@163.com>

.github/workflows/pr-test-npu.yml

@@ -281,3 +281,42 @@ jobs:
           export PATH="/usr/local/Ascend/8.3.RC1/compiler/bishengir/bin:${PATH}"
           cd python
           python3 sglang/multimodal_gen/test/run_suite.py --suite 1-npu
+
+  multimodal-gen-test-2-npu-a3:
+    needs: [check-changes, pr-gate]
+    if: needs.check-changes.outputs.multimodal_gen == 'true'
+    runs-on: linux-aarch64-a3-16
+    container:
+      image: swr.cn-southwest-2.myhuaweicloud.com/base_image/ascend-ci/cann:8.3.rc2-a3-ubuntu22.04-py3.11
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          # speed up by using infra cache services
+          CACHING_URL="cache-service.nginx-pypi-cache.svc.cluster.local"
+          sed -Ei "s@(ports|archive).ubuntu.com@${CACHING_URL}:8081@g" /etc/apt/sources.list
+          pip config set global.index-url http://${CACHING_URL}/pypi/simple
+          pip config set global.extra-index-url "https://pypi.tuna.tsinghua.edu.cn/simple"
+          pip config set global.trusted-host "${CACHING_URL} pypi.tuna.tsinghua.edu.cn"
+
+          bash scripts/ci/npu/npu_ci_install_dependency.sh a3
+          # copy required file from our daily cache
+          cp ~/.cache/modelscope/hub/datasets/otavia/ShareGPT_Vicuna_unfiltered/ShareGPT_V3_unfiltered_cleaned_split.json /tmp
+          # copy download through proxy
+          curl -o /tmp/test.jsonl -L https://gh-proxy.test.osinfra.cn/https://raw.githubusercontent.com/openai/grade-school-math/master/grade_school_math/data/test.jsonl
+
+      - name: Run test
+        timeout-minutes: 60
+        env:
+          SGLANG_USE_MODELSCOPE: true
+          SGLANG_IS_IN_CI: true
+          HF_ENDPOINT: https://hf-mirror.com
+          TORCH_EXTENSIONS_DIR: /tmp/torch_extensions
+          PYTORCH_NPU_ALLOC_CONF: "expandable_segments:True"
+          STREAMS_PER_DEVICE: 32
+        run: |
+          export PATH="/usr/local/Ascend/8.3.RC1/compiler/bishengir/bin:${PATH}"
+          cd python
+          python3 sglang/multimodal_gen/test/run_suite.py --suite 2-npu