feat: Better Helm design

[s0uky]

Description:
The official Helm chart for the Gateway component should be more robust and comprehensive. Currently, it seems to lack resources for managing deployments of GatewayClass, Gateway, and other child objects associated with CRDs. Values file should be more configurable.

Extract all Kubernetes resource definitions related to the Gateway component from the source code (like this example with statsd:

gateway/internal/infrastructure/kubernetes/ratelimit/resource.go

Line 205 in 301eedd

Name: "prom-statsd-exporter",

) and consolidate them into a single location. This improves maintainability over Helm chart.

Ideally, the Helm chart should provide a single point of control to manage the creation and configuration of GatewayClass, Gateway, and other related CRD objects.

[zirain]

prom-statd-exporter issue tracked here.

[s0uky]

Yes, I know about the issue with statsd. My point was it's not good to hardcode any configuration which could be done through Helm.

[zirain]

indeed we should, that's a huge gap between rerfect and real.
any controbutions around this is welcome.