CORS-3250: images/altinfra: add etcd/kas binaries from containers

When building the altinfra image for inclusion in the release payload,
we cannot download any binaries as it is currently done for etcd/kas.
Instead let's copy those binaries from their existing container images.

Author: r4f4

images/installer-altinfra/Dockerfile.ci

@@ -7,18 +7,25 @@
 # solutions. Once all providers have alternate implementations, this image will
 # not be needed. 
 
-FROM registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.21-openshift-4.16 AS builder
+FROM registry.ci.openshift.org/ocp/4.16:etcd AS etcd
+FROM registry.ci.openshift.org/ocp/4.16:hyperkube AS kas
+
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.21-openshift-4.16 AS builder
 # FIPS support is offered via the baremetal-installer image
 ENV GO_COMPLIANCE_EXCLUDE=".*"
 ARG TAGS="altinfra"
 ARG OPENSHIFT_INSTALL_CLUSTER_API=""
 WORKDIR /go/src/github.com/openshift/installer
+COPY --from=etcd /usr/bin/etcd /usr/bin/etcd
+COPY --from=kas /usr/bin/kube-apiserver /usr/bin/kube-apiserver
 COPY . .
+RUN mkdir -p cluster-api/bin/$(go env GOOS)_$(go env GOHOSTARCH) && \
+	mv /usr/bin/etcd /usr/bin/kube-apiserver -t cluster-api/bin/$(go env GOOS)_$(go env GOHOSTARCH)/
 RUN DEFAULT_ARCH="$(go env GOHOSTARCH)" hack/build.sh
 RUN go run -mod=vendor hack/build-coreos-manifest.go
 
 
-FROM registry.ci.openshift.org/ocp/4.16:base
+FROM registry.ci.openshift.org/ocp/4.16:base-rhel9
 COPY --from=builder /go/src/github.com/openshift/installer/bin/openshift-install /bin/openshift-install
 COPY --from=builder /go/src/github.com/openshift/installer/bin/manifests/ /manifests/
 RUN mkdir /output && chown 1000:1000 /output