Add agents.localService parameters

[L3n41c]

What this PR does / why we need it:

1. Add an option to set the service name use to communicate with the node agent.
2. Add an option to force the activation of internalTrafficPolicy to support Kubernetes version on which the feature is still alpha.

agents:
  localService:
    overrideName: ""
    forceLocalServiceEnabled: false

Which issue this PR fixes

• fixes Restore k8s service name override support #429

Special notes for your reviewer:

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Documentation has been updated with helm-docs (run: .github/helm-docs.sh)
• Chart Version bumped
• CHANGELOG.md has beed updated
• Variables are documented in the README.md

[hi-artem]

@L3n41c @vboulineau is the value in in the values.yaml misspelled and missing d at the end?