UPSTREAM: <carry>: openshift: Updating images/cluster-autoscaler/Dock…

…erfile.rhel baseimages to mach ocp-build-data config

this is a copy of the autogenerated commit, original message:

This PR is autogenerated by the [ocp-build-data-enforcer][1].
It updates the base images in the Dockerfile used for promotion in order
to ensure it
matches the configuration in the [ocp-build-data repository][2] used
for producing release artifacts.

Instead of merging this PR you can also create an alternate PR that
includes the changes found here.

If you believe the content of this PR is incorrect, please contact the
dptp team in #aos-art.

[1]:
https://github.com/openshift/ci-tools/tree/master/cmd/ocp-build-data-enforcer
[2]:
https://github.com/openshift/ocp-build-data/tree/openshift-4.6/images

images/cluster-autoscaler/Dockerfile.rhel

@@ -1,4 +1,4 @@
-FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-openshift-4.6 AS builder
+FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.6 AS builder
 WORKDIR /go/src/k8s.io/autoscaler
 COPY . .
 RUN go build -o cluster-autoscaler/cluster-autoscaler ./cluster-autoscaler