trigger full build on release branches

Author: richardelms

.buildkite/pipeline_trigger.sh

@@ -3,6 +3,7 @@
 if [[ "$BUILDKITE_MESSAGE" == *"[full ci]"* ||
   "$BUILDKITE_BRANCH" == "next" ||
   "$BUILDKITE_BRANCH" == "main" ||
+  "$BUILDKITE_BRANCH" == releases/* ||
   ! -z "$FULL_SCHEDULED_BUILD" ||
   "$BUILDKITE_PULL_REQUEST_BASE_BRANCH" == "main" ]]; then
   echo "Running full build"