feat(argo-rollouts): add dashboard (#798)

* feat(argo-rollouts): add dashboard deployment and service

credit: the implemention is inspired by the work from
    Andrii Perenesenko <andrii.perenesenko@gmail.com>.

Signed-off-by: Hui Kang <hui.kang@salesforce.com>

* Apply suggestions from code review

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

* Add components to selectlabels

Signed-off-by: Hui Kang <hui.kang@salesforce.com>

* Bump major version and add upgrading note

Signed-off-by: Hui Kang <hui.kang@salesforce.com>

* fix: Documentation on dashboard values, change annotations

Signed-off-by: Hui Kang <hui.kang@salesforce.com>

* feat: Enable dashboard during chart testing

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

Co-authored-by: Hui Kang <hui.kang@salesforce.com>
Co-authored-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

charts/argo-rollouts/templates/dashboard/clusterrolebinding.yaml

@@ -0,0 +1,17 @@
+{{- if and .Values.dashboard.enabled .Values.clusterInstall }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "argo-rollouts.fullname" . }}-dashboard
+  labels:
+    app.kubernetes.io/component: {{ .Values.dashboard.component }}
+    {{- include "argo-rollouts.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "argo-rollouts.fullname" . }}-dashboard
+subjects:
+- kind: ServiceAccount
+  name: {{ include "argo-rollouts.serviceAccountName" . }}-dashboard
+  namespace: {{ .Release.Namespace }}
+{{- end }}