v1 - v2 Migration - Change in URL to use for Receiver Endpoints

[SeamusGrafana]

In v1 if you had Traces Enabled you would send them to an endpoint like this;

http://grafana-k8s-monitoring-alloy.k8s-monitoring.svc.cluster.local:4318

However in v2, there is no equavilent endpoint, due to the new Architecture, so any configuration using that URL needs to be updated, to something like;

http://grafana-k8s-monitoring-alloy-receiver.k8s-monitoring.svc.cluster.local:4318

It may be worth a note in the Docs for this, as its easy to overlook, or to ad an option to the Receiver HELM Chart to deploy a legacy service name, to allow using that old Endpoint.