build(system-tests): fetch manylinux builds from ddtrace

Author: florentinl

.github/workflows/build_layer.yml

@@ -18,6 +18,32 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Generate token
+        id: generate_token
+        uses: actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e # v2.0.6
+        with:
+          app-id: ${{ secrets.GH_APP_ID }}
+          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+
+      - name: Download ddtrace wheel from GitHub workflow artifacts
+        env:
+          GH_TOKEN: ${{ steps.generate_token.outputs.token }}
+
+        run: |
+          WORKFLOWS=$(curl --silent --fail --show-error -H "Authorization: token $GH_TOKEN" "https://api.github.com/repos/DataDog/dd-trace-py/actions/workflows/build_deploy.yml/runs?per_page=100")
+          ARTIFACT_URL=$(echo "$WORKFLOWS" | jq -r '[.workflow_runs[] | select(.conclusion != "failure" and .head_branch == "main" and .status == "completed")][0] | .artifacts_url')
+          ARTIFACTS=$(curl --silent --fail --show-error -H "Authorization: token $GH_TOKEN" "$ARTIFACT_URL")
+
+          VERSION_NO_DOT=$(echo ${{ matrix.python_version }} | sed 's/\.//g')
+          DDTRACE_ARCH=$(if [ "${{ matrix.arch }}" == "arm64" ]; then echo "aarch64"; else echo "x86_64"; fi)
+          ARTIFACT_NAME=wheels-cp${VERSION_NO_DOT}-manylinux_${DDTRACE_ARCH}
+
+          ARCHIVE_URL=$(echo "$ARTIFACTS" | jq -r '.artifacts[] | select(.name == "'"${ARTIFACT_NAME}"'") | .archive_download_url')
+
+          curl --silent --fail --show-error -H "Authorization: token $GH_TOKEN" -L "$ARCHIVE_URL" --output artifacts.zip
+          unzip artifacts.zip
+
+
       - name: Patch pyproject.toml
         run: |
           echo "Patching pyproject.toml to use main branch of dd-trace-py"