Consolidate helm charts

CHANGES:
- Added an appVersion and icon to helm Chart.yaml
- Refactored to use `required` in chart manifests rather than
  outputting an error message in notes
- Namespaced `name` and `fullname` template partials to `vk`
- Enabled rbac apiVersion configuration
- Removed role-binding and service-account suffixes from resource
  names
- Fixed bug where virtual-kubelet service account would not be
  bound to cluster role if chart was installed outside the default
  namespace
- Removed hardcoded `azure` provider

BREAKING CHANGES:
- Virtual-Kubelet specific values previously nested under `env` are
  now declared at the top level of the values file.
- Azure provider configuration values previously nested under `env`
  are now at `providers.azure`

charts/virtual-kubelet-for-aks/templates/_helpers.tpl

@@ -1,16 +0,0 @@
-{{/* vim: set filetype=mustache: */}}
-{{/*
-Expand the name of the chart.
-*/}}
-{{- define "name" -}}
-{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
-{{- end -}}
-
-{{/*
-Create a default fully qualified app name.
-We truncate at 24 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
-*/}}
-{{- define "fullname" -}}
-{{- $name := default .Chart.Name .Values.nameOverride -}}
-{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
-{{- end -}}