Updating ose-aws-pod-identity-webhook builder & base images to be con…

…sistent with ART

Reconciling with https://github.com/openshift/ocp-build-data/tree/0b997d0add07947c7ca65baa44901a2d113fd0e9/images/ose-aws-pod-identity-webhook.yml

Dockerfile.rhel7

@@ -1,8 +1,8 @@
-FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-1.15-openshift-4.6 AS builder
+FROM registry.svc.ci.openshift.org/ocp/builder:rhel-8-golang-openshift-4.7 AS builder
 WORKDIR /go/src/github.com/aws/amazon-eks-pod-identity-webhook
 COPY . .
 ENV GO_PACKAGE github.com/aws/amazon-eks-pod-identity-webhook
 RUN make amazon-eks-pod-identity-webhook
 
-FROM registry.svc.ci.openshift.org/ocp/4.6:base
+FROM registry.svc.ci.openshift.org/ocp/4.7:base
 COPY --from=builder /go/src/github.com/aws/amazon-eks-pod-identity-webhook/amazon-eks-pod-identity-webhook /usr/bin/aws-pod-identity-webhook