updating skipper dockerfile, moving to rhel base image (#1197)

Dockerfile.kmm-operator-build

@@ -1,12 +1,12 @@
-FROM golang:1.21-alpine3.19
+FROM registry.ci.openshift.org/openshift/release:rhel-8-release-golang-1.21-openshift-4.17
 
 ENV GO111MODULE=on
 ENV GOFLAGS=""
 ENV CGO_ENABLED=0
 ENV GOOS=linux
 ENV GOARCH=amd64
 
-RUN ["apk", "add", "bash", "make", "docker", "curl", "shadow", "git"]
+RUN yum install -y podman docker
 RUN go install go.uber.org/mock/[email protected]
 RUN curl -L "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" -o /tmp/kubectl
 RUN install -o root -g root -m 0755 /tmp/kubectl /usr/local/bin/kubectl