Mount /etc/hosts from host for CoreDNS

[hakman]

This should fix the failing ServiceAccounts ServiceAccountIssuerDiscovery should support OIDC discovery of service account issuer test for GCE:
https://testgrid.k8s.io/kops-gce#kops-grid-gce-calico-u2004-k24-containerd

[hakman]

/test pull-kops-e2e-k8s-gce
/test pull-kops-e2e-kubernetes-do-gossip

[k8s-ci-robot]

@hakman: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kops-e2e-kubernetes-do-gossip	716410a	link	false	/test pull-kops-e2e-kubernetes-do-gossip

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[hakman]

/test pull-kops-e2e-kubernetes-do-gossip

[hakman]

pull-kops-e2e-kubernetes-do-gossip fails the StatefulSet tests, same as in periodic tests, due to a DO CSI driver issue:
https://testgrid.k8s.io/kops-misc#e2e-kops-do-calico

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: olemarkus

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