Update CoreDNS to version 1.8.3.

[briandowns]

This also required a run of go generate.

Proposed Changes

Types of Changes

Updates CoreDNS to 1.8.3.

Verification

Linked Issues

#3001

Further Comments

[brandond]

It looks like the CoreDNS RBAC needs to be updated:

[[36mPARALLEL[m] E0409 20:45:48.534248       1 reflector.go:138] pkg/mod/k8s.io/[email protected]/tools/cache/reflector.go:167: Failed to watch *v1beta1.EndpointSlice: failed to list *v1beta1.EndpointSlice: endpointslices.discovery.k8s.io is forbidden: User “system:serviceaccount:kube-system:coredns” cannot list resource “endpointslices” in API group “discovery.k8s.io” at the cluster scope
[[36mPARALLEL[m] E0409 20:46:38.910482       1 reflector.go:138] pkg/mod/k8s.io/[email protected]/tools/cache/reflector.go:167: Failed to watch *v1beta1.EndpointSlice: failed to list *v1beta1.EndpointSlice: endpointslices.discovery.k8s.io is forbidden: User “system:serviceaccount:kube-system:coredns” cannot list resource “endpointslices” in API group “discovery.k8s.io” at the cluster scope

We should compare the current RBAC to the manifest here: https://github.com/coredns/deployment/blob/f15e936388424b64c927b1d8f6965575ea592ea8/kubernetes/coredns.yaml.sed#L6-L30