Merge pull request #340 from elastic/update-ubuntu

[CI] Upgrade to ubuntu 24.04 as the default distro used everywhere

Author: brianseeders

.buildkite/pipeline.dra.yml

@@ -13,6 +13,6 @@ steps:
       USE_DRA_CREDENTIALS: "true"
     agents:
       provider: gcp
-      image: family/elasticsearch-ubuntu-2004
+      image: family/elasticsearch-ubuntu-2404
       machineType: n2-standard-4
       diskSizeGb: 100