Add API VirtualService back

Summary

The VS for the Anchore API was removed in the latest tag (2.0.2-bb.1).

What is the current behavior?

Pipelines that depend on that endpoint are failing to reach it as it was deleted.

Possible fixes

Add this template back to this file

{{- if and .Values.istio.enabled .Values.istio.api.enabled }}
apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: anchore-engine-api-service
  namespace: {{ .Release.Namespace }}
  {{- if .Values.istio.api.labels }}
  labels:
{{ toYaml .Values.istio.api.labels | indent 4 }}
  {{- end }}
  {{- if .Values.istio.api.annotations }}
  annotations:
{{ toYaml .Values.istio.api.annotations | indent 4 }}
  {{- end }}
spec:
  gateways:
  {{- range .Values.istio.api.gateways }}
    - {{ . }}
  {{- end }}
  hosts:
  {{- range .Values.istio.api.hosts }}
    - {{ tpl . $ }}
  {{- end }}
  http:
    - match:
        - uri:
            prefix: /metrics
      route:
        - destination:
            port:
              number: {{ .Values.anchoreApi.service.port }} 
            host: {{ .Release.Name }}-anchore-engine-api
      fault:
        abort:
          percentage:
            value: 100
          httpStatus: 403
    - match:
        - uri:
            prefix: /
      route:
        - destination:
            port:
              number: {{ .Values.anchoreApi.service.port }} 
            host: {{ .Release.Name }}-anchore-engine-api
{{- end }}

/cc {put CODEOWNERs @githandles here}