feat(argocd-notifications): Add slack icon and signingSecret support and Grafana support (#384)

* Add icon and signingSecret support

* Fix typo

* Add grafana support

* Fix trailing spaces

* Fix trailing spaces 2

* Fix grafana comments

* Add bot manifests

* Bump version

* No new line character

* Values.yaml new line character

* Add comments

* Add slack.enabled flag

* Move slack bot to bots/slack folder

Co-authored-by: sergeyshaykhullin <sergeyshaykhullin@gmail.com>
Co-authored-by: Sergey Shaykhullin <46970457+sergeyshaykhullin@users.noreply.github.com>

charts/argocd-notifications/templates/deployment.yaml

@@ -22,7 +22,7 @@ spec:
       serviceAccountName: {{ include "argocd-notifications.serviceAccountName" . }}
       containers:
         - name: {{ include "argocd-notifications.name" . }}-controller
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag}}"
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           resources:
             {{- toYaml .Values.resources | nindent 12 }}