ci: Workaround for download-artifact action bug

The GitHub download-artifact action may fail to download some artifact
files without any errors, and this often causes the SDK test jobs to
fail.

This commit works around the above issue by using the `gh` CLI command
to download the SDK bundle artifact.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

.github/workflows/ci.yml

@@ -1532,10 +1532,21 @@ jobs:
         echo "BUNDLE_DIR=${BUNDLE_DIR}" >> $GITHUB_ENV
 
     - name: Download distribution bundle
-      uses: actions/download-artifact@v4
-      with:
-        name: ${{ env.BUNDLE_NAME }}
-        path: artifacts
+      # FIXME: download-artifact is buggy and may fail to download some files
+      #        without any errors. For more details, refer to the GitHub issue
+      #        actions/download-artifact#396.
+      # uses: actions/download-artifact@v4
+      # with:
+      #   name: ${{ env.BUNDLE_NAME }}
+      #   path: artifacts
+      run: |
+        gh run download \
+          -R ${GITHUB_REPOSITORY} \
+          ${GITHUB_RUN_ID} \
+          -n ${BUNDLE_NAME} \
+          -D artifacts
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
     - name: Install distribution bundle
       run: |