supervisor: Consider to replace usage of corev1.Endpoints by discoveryv1.EndpointSlice for

[chrischdi]

/kind feature

Describe the solution you'd like

corev1.Endpoints is deprecated in v1.33+.

xref: https://kubernetes.io/blog/2025/04/24/endpoints-deprecation/

We make use of corev1.Endpoints and corev1.EndpointSubset in the Servicediscovery controller to create endpoints for the service pointing to supervisor.
We should start creating corev1.EndpointSubset's instead.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Cluster-api-provider-vsphere version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[sbueringer]

Just to mention it. They do not plan to remove corev1.Endpoints

Only

Eventually, the plan (as documented in KEP-4974) is to change the Kubernetes Conformance criteria to no longer require that clusters run the Endpoints controller (which generates Endpoints objects based on Services and Pods), to avoid doing work that is unneeded in most modern-day clusters.