[CI] Add VERSION_QUALIFIER to dra-update-staging script

Author: brianseeders

.buildkite/scripts/dra-update-staging.sh

@@ -36,6 +36,9 @@ for BRANCH in "${BRANCHES[@]}"; do
   fi
 
   if [[ "$SHOULD_TRIGGER" == "true" ]]; then
+    if [[ "$BRANCH" == "9.0" ]]; then
+      export VERSION_QUALIFIER="beta1"
+    fi
     echo "Triggering DRA staging workflow for $BRANCH"
     cat << EOF | buildkite-agent pipeline upload
 steps:
@@ -46,6 +49,7 @@ steps:
       branch: "$BRANCH"
       env:
         DRA_WORKFLOW: staging
+        VERSION_QUALIFIER: ${VERSION_QUALIFIER:-}
 EOF
   fi
 done