Ignore main branch in staging DRA jobs

Author: mark-vieira

.buildkite/dra.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 
 DRA_WORKFLOW=${DRA_WORKFLOW:-snapshot}
 
-if [[ "$BUILDKITE_BRANCH" == *.x && "$DRA_WORKFLOW" == "staging" ]]; then
+if [[ ("$BUILDKITE_BRANCH" == "main" || "$BUILDKITE_BRANCH" == *.x) && "$DRA_WORKFLOW" == "staging" ]]; then
   exit 0
 fi