Allow VPA recommender to be specified

[hobti01]

Is your feature request designed to solve a problem? If so describe the problem this feature should solve.:

The fluent-bit Helm Chart does not support setting the VPA recommender name

Describe the solution you'd like.:

A property used to specify the recommender in the VerticalPodAutoscaler resource

autoscaling:
  vpa:
    # VPA recommender that will provide recommendations for vertical scaling
    recommender: default

modification to vpa.yaml

spec:
  recommenders:
    - name: {{ .Values.autoscaling.vpa.recommender }}