Implement elasticsearch sink

[serboctor]

Implement a sink that writes to elasticsearch. The user should be able to configure the address of elasticsearch and the index to write to.

[waleedhammam]

Target entity test

apiVersion: apps/v1
kind: Deployment
metadata:
  name: myapp-4
  labels:
    app: myapp-4
spec:
  selector:
    matchLabels:
      app: myapp-4
  template:
    metadata:
      labels:
        app: myapp-4
    spec:
      containers:
        - name: container-1
          image: ubuntu
          securityContext:
            privileged: true
            allowPrivilegeEscalation: true

Verification Steps

• Start the agent with helm chart in admission upsert mode, using ngrok to tunnel the elasticsearch port to pod, Works OK

• Start the agent with helm chart in admission insert mode, using ngrok to tunnel the elasticsearch port to pod, Works OK

• Start the agent with helm chart in audit upsert mode, using ngrok to tunnel the elasticsearch port to pod, Works OK

• Start the agent with helm chart in audit insert mode, using ngrok to tunnel the elasticsearch port to pod, Works OK