feat(extras): added support for extra objects

[rohitphataklm]

• Added support for extra objects in argus helm chart

How to add extra objects

• Following is the yaml configuration for addi. Here as an extra object I have added a Kubernetes configmap

  argus:
   extraObjects:
    - apiVersion: v1
      kind: ConfigMap
      metadata:
        name: extra-config
      data:
        key1: value1
        key2: value2

• This adds the listed configmap when argus is installed