Kubernetes v.1.33+ deprecates endpoints:

Describe the bug
kubernetes v.1.33+ deprecates endpoints:

I0611 01:07:53.372731 1 warnings.go:110] "Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice"

To Reproduce
Steps to reproduce the behavior:
- args:
- '-admin-addr=0.0.0.0'
- '-admin-port=6083'
- '-signaller-enable'
- '-signaller-port=8090'
- '-frontend-watch'
- '-frontend-namespace=$(NAMESPACE)'
- '-frontend-service=varnish-headless'
- '-frontend-portname=http-varnish'
- '-frontend-port=6081'
- '-backend-watch'
- '-backend-namespace=$(NAMESPACE)'
- '-backend-service=my-app-service-no-cache'
- '-varnish-secret-file=/etc/varnish/k8s-secret/secret'
- '-varnish-vcl-template=/etc/varnish/tmpl/default.vcl.tmpl'
- '-varnish-storage=malloc,100M'

Expected behavior

No warning appears around kubernetes api

Environment:

• Kubernetes version: [e.g. 1.18]
• kube-httpcache version: [e.g. v0.2.2]

Configuration
If applicable, add your VCL configuration file and other relevant configuration settings

Additional context
Add any other context about the problem here.

Reproduce the warning on Kubernetes 1.33+ using the provided frontend-watch and backend-watch arguments, then locate the Kubernetes service-watching entry points. Trace where the deprecated v1 Endpoints API is used and update the watch path to the discovery.k8s.io/v1 EndpointSlice API. Done means both watches work without the deprecation warning.