tilt-prepare command doesn't check if the addons provider has already metrics port exposed

[prometherion]

What steps did you take and what happened?

I'm debugging locally CAPI along with a set of providers using Tilt by using the following file:

{
  "enable_providers": [
    "core",
    "kubeadm-bootstrap",
    "kamaji",
    "kamaji-core"
  ],
  "provider_repos": [
    "../../clastix/kamaji",
    "../../clastix/cluster-api-control-plane-provider-kamaji"
  ],
  "deploy_cert_manager": true,
  "trigger_mode": "manual",
  "kustomize_substitutions": {
    "EXP_CLUSTER_RESOURCE_SET": "true"
  }
}

The kamaji-core Kustomize manifest is already exporting a metrics port, however, the rendered manifest will end-up with a duplicate port, being impossible to setup the whole environment.

What did you expect to happen?

tilt-prepare should skip adding the ports item if the addon Deployment manifest is already offering a metrics port listening on 8080.

Cluster API version

v1.5.0

Kubernetes version

N.R.

Anything else you would like to add?

I already have a PR to fix this.

Label(s) to be applied

/kind bug
/area clusterctl

[sbueringer]

/triage accepted