Support hostAliases customization in otel collector

[ethernoy]

We can add hostAliases customization to otel collector helm chart.

https://kubernetes.io/docs/tasks/network/customize-hosts-file-for-pods/

I am happy to submit a PR for this :)

[dmitryax]

@ethernoy sorry for the delayed response. why it must be part of this helm chart? can it be deployed separately?

[oluatte]

I think this would solve a problem we are having at the moment. We need to configure some applications to point to the open telemetry collector (app pods are on the same node as the daemonset pod) in a static way (can't use environment variables). We are having a hard time getting this working because we can't use the downward api.

[dmitryax]

Ok, it sounds reasonable. Feel free to submit a PR