Add the hubble-metrics service for cilium

[rifelpet]

Copied from https://github.com/cilium/cilium/blob/main/install/kubernetes/cilium/templates/hubble/metrics-service.yaml

Fixes #16032

[k8s-ci-robot]

@rifelpet: 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-cni-cilium-ipv6	2d67df6	link	false	/test pull-kops-e2e-cni-cilium-ipv6

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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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hakman

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[rifelpet]

/milestone v1.31