Network policies

Introducing Network policies as a subchart of the loki-v2 umbrella chart.

This subchart is disabled by default. When enabled:

• Add a label on the namespace with the contract name
• create a network policy for allowing ingress traffic
  • from every namespace having the same contract name
  • from ingress controllers
  • from monitoring namespace

Values for enabling or disabling and parametrize this feature are managed in trackbone under the file loki.cue.

https://jira.corp.caascad.com/browse/PF-2687