Helm chart apisix control ingress fails due to missing port.

Error message:
> * Ingress.networking.k8s.io "apisix-control" is invalid: spec.rules[0].http.paths[0].backend: Required value: port name or number is required

There is an inconsistency between the values.yaml and the chart template.
- chart for ingress control is looking for the service Port via [`.Values.control.servicePort`](https://github.com/apache/apisix-helm-chart/blob/master/charts/apisix/templates/ingress-control.yaml#L19)
- but values.yaml specifies that via (translated) [`.Values.control.service.servicePort`](https://github.com/apache/apisix-helm-chart/blob/master/charts/apisix/values.yaml#L242)

Your decision which way it should be fixed/added/commented. Workaround is to define this value as `control.servicePort` in the custom values.yaml

Start by comparing charts/apisix/templates/ingress-control.yaml at line 19 with charts/apisix/values.yaml at line 242, focusing on the control service port path. Confirm the rendered control ingress no longer lacks a port and that the values structure and template reference are consistent.

Written by the indexing model from the issue text.