CI Snapdragon: Switch ubuntu-latest to ubuntu-slim runner (#22303)

* switch ubuntu-latest to ubuntu-slim

* Fix the path for upload so CI doesn't fail

* Update .github/workflows/build-and-test-snapdragon.yml

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* Use -slim image for key check and consistent naming for artifact dir

Signed-off-by: Max Krasnyansky <maxk@qti.qualcomm.com>

* Remove check-secret extra job

* move QDC key check for Run QDC jobs step specifically

* add a step before to check the secret for qdc jobs

---------

Signed-off-by: Max Krasnyansky <maxk@qti.qualcomm.com>
Co-authored-by: Max Krasnyansky <maxk@qti.qualcomm.com>
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

.github/workflows/build-and-test-snapdragon.yml

@@ -49,28 +49,19 @@ jobs:
           cp docs/backend/snapdragon/CMakeUserPresets.json .
           cmake --preset arm64-android-snapdragon-release -B build
           cmake --build build
-          cmake --install build --prefix pkg-adb/llama.cpp
+          cmake --install build --prefix pkg-snapdragon/llama.cpp
 
       - name: Upload Llama.CPP Snapdragon Android Build Artifact
         if: ${{ always() && steps.build_llama_cpp_snapdragon_android.outcome == 'success' }}
         uses: actions/upload-artifact@v6
         with:
           name: llama-cpp-android-arm64-snapdragon
-          path: pkg-adb/llama.cpp
-
-  check-secret:
-    runs-on: ubuntu-latest
-    outputs:
-      has-key: ${{ steps.check.outputs.has-key }}
-    steps:
-      - id: check
-        run: echo "has-key=${{ secrets.QDC_API_KEY != '' }}" >> "$GITHUB_OUTPUT"
+          path: pkg-snapdragon/llama.cpp
 
   test-snapdragon-qdc:
     name: Test on QDC Android Device (${{ matrix.device }})
-    needs: [android-ndk-snapdragon, check-secret]
-    if: needs.check-secret.outputs.has-key == 'true'
-    runs-on: ubuntu-latest
+    needs: [android-ndk-snapdragon]
+    runs-on: ubuntu-slim
     strategy:
       fail-fast: false
       matrix:
@@ -81,10 +72,10 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Download build artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
         with:
           name: llama-cpp-android-arm64-snapdragon
-          path: pkg-snapdragon/
+          path: pkg-snapdragon/llama.cpp
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -92,13 +83,25 @@ jobs:
           python-version: '3.x'
           cache: pip
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y curl unzip
+
       - name: Install QDC SDK wheel
         run: |
           curl -fSL -o qdc_sdk.zip https://softwarecenter.qualcomm.com/api/download/software/tools/Qualcomm_Device_Cloud_SDK/All/0.2.3/qualcomm_device_cloud_sdk-0.2.3.zip
           unzip qdc_sdk.zip -d qdc_sdk
           pip install qdc_sdk/qualcomm_device_cloud_sdk-0.2.3-py3-none-any.whl
 
+      - name: Check QDC API key
+        id: check_secret
+        env:
+          QDC_API_KEY: ${{ secrets.QDC_API_KEY }}
+        run: echo "has-qdc-key=${{ env.QDC_API_KEY != '' }}" >> "$GITHUB_OUTPUT"
+
       - name: Run QDC tests (${{ matrix.device }})
+        if: steps.check_secret.outputs.has-qdc-key == 'true'
         run: |
           python scripts/snapdragon/qdc/run_qdc_jobs.py \
               --test       all \