Check for DO_NOT_PUBLISH_TAR before uploading to CI (#13700)

ci/upload-ci-artifact.sh

@@ -16,3 +16,16 @@ upload-ci-artifact() {
   fi
 }
 
+upload-s3-artifact() {
+  echo "--- artifact: $1 to $2"
+  (
+    set -x
+    docker run \
+      --rm \
+      --env AWS_ACCESS_KEY_ID \
+      --env AWS_SECRET_ACCESS_KEY \
+      --volume "$PWD:/solana" \
+      eremite/aws-cli:2018.12.18 \
+      /usr/bin/s3cmd --acl-public put "$1" "$2"
+  )
+}