Document discovery mode with all pod logs and host logs from filelog receiver

Document how to configure the (Daemon) Collector to combine hints-based auto-discovery (to collect logs from all pods) with logs for hosts coming from static filelog receiver.

- copy values.yaml file locally
- adjust daemon collector config
- how to disable filelog receiver for all pod logs (but only keep it for host logs)
- annotate all pods with `io.opentelemetry.discovery.logs/enabled`
- customize (as needed) processing / parsing for selected pods using annotations + filelog receiver operators