Remove duplicate health check code

[ahg-g]

With kubernetes-sigs/gateway-api-inference-extension#965 merged, we can now get rid of the code we have in https://github.com/llm-d/llm-d-inference-scheduler/blob/main/cmd/epp/health.go

[ahg-g]

/good-first-issue

[mohsincsv]

Hi @ahg-g, I'm interested in contributing here. Based on my understanding:

With #965 merged, we can now remove cmd/epp/health.go and update main.go to import and use the upstream health implementation. Specifically, updating the registerHealthServer function to use something like healthserver.NewHealthServer(logger, ds).

I'd also appreciate your confirmation to use this import path:
sigs.k8s.io/gateway-api-inference-extension/pkg/epp/health

I'm ready to create a PR once you confirm these changes.

[ahg-g]

Yes, that is correct.

But also with kubernetes-sigs/gateway-api-inference-extension#956 merging and the progress being made in kubernetes-sigs/gateway-api-inference-extension#881, as a followup we will be able to get rid of most of the main.go file.

/cc @nirrozenbaum if you prefer to wait and do the cleanup after the config api changes land

[nirrozenbaum]

I was actually going to get the health code removed completely in #179 after getting kubernetes-sigs/gateway-api-inference-extension#956 merged.

[nirrozenbaum]

fixed by #179