[build] Use Elastic hosted UBI minimal base image (#77776) (#77826)

Signed-off-by: Tyler Smalley <tyler.smalley@elastic.co>

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: Tyler Smalley

src/dev/build/tasks/os_packages/docker_generator/run.ts

@@ -40,7 +40,7 @@ export async function runDockerGenerator(
   ubi: boolean = false
 ) {
   // UBI var config
-  const baseOSImage = ubi ? 'registry.access.redhat.com/ubi8/ubi-minimal:latest' : 'centos:8';
+  const baseOSImage = ubi ? 'docker.elastic.co/ubi8/ubi-minimal:latest' : 'centos:8';
   const ubiVersionTag = 'ubi8';
   const ubiImageFlavor = ubi ? `-${ubiVersionTag}` : '';