Add an AUDIT mode

[gruebel]

To make the adoption of whorf easier it would be great to have the capability of running it an AUDIT mode, where it still scans everything as it should, but doesn't block any request. This should be configured in the whorf config file.

ex.
k8s/whorfconfig.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: whorfconfig
  namespace: bridgecrew
data:
  # whorf specific config
  whorf.yaml: |
    audit: true
    ignore-namespaces:
      ...