[ci] Increase disk size for DRA workflow job

Author: brianseeders

.buildkite/pipelines/dra-workflow.yml

@@ -8,6 +8,7 @@ steps:
       machineType: custom-32-98304
       localSsds: 1
       localSsdInterface: nvme
+      diskSizeGb: 350
   - wait
   # The hadoop build depends on the ES artifact
   # So let's trigger the hadoop build any time we build a new staging artifact