Add some logging for easier debugging in case of problems

Log what URL is used to fetch manifest and make the curl command fail in
 case of error like 404 response.

Author: jozala

.ci/scripts/resolve-dra-manifest.sh

@@ -6,7 +6,8 @@ strip_version() {
 }
 
 fetch_build() {
-  curl -sS https://artifacts-$1.elastic.co/$2/latest/$3.json \
+  >&2 echo "Checking for build id: https://artifacts-$1.elastic.co/$2/latest/$3.json"
+  curl -sSf https://artifacts-$1.elastic.co/$2/latest/$3.json \
     | jq -r '.build_id'
 }