Context: 

"Can we use a public image from docker.io, quay.io, or some public RH registry? I was able to build with FROM }}{{docker.io/golang:1.23{} as go-builder.
 Adding another login requirement makes dev less accessible to potential contributors outside this group, and more awkward for us. " Slack 

Update Dockerfile to use `registry.redhat.io/ubi9/go-toolset:latest AS go-builder`. A follow up to: 

https://github.com/openshift/monitoring-plugin/pull/375
https://github.com/openshift/monitoring-plugin/pull/376
https://github.com/openshift/monitoring-plugin/pull/377
https://github.com/openshift/logging-view-plugin/pull/268
https://github.com/openshift/distributed-tracing-console-plugin/pull/83
https://github.com/openshift/troubleshooting-panel-console-plugin/pull/122