Add Go proxy smoke test to setup-jfrog action

Co-authored-by: Isaac

Author: pietern

.github/actions/setup-jfrog/action.yml

@@ -61,3 +61,9 @@ runs:
         echo "GONOSUMDB=*" >> "$GITHUB_ENV"
         echo "UV_INDEX_URL=https://${CREDS}@databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple" >> "$GITHUB_ENV"
         echo "PIP_INDEX_URL=https://${CREDS}@databricks.jfrog.io/artifactory/api/pypi/db-pypi/simple" >> "$GITHUB_ENV"
+
+    - name: Verify Go proxy access
+      shell: bash
+      run: |
+        set -euo pipefail
+        GONOSUMDB=* GOPROXY="${GOPROXY}" go get golang.org/x/sys@latest