[argo-event] allow extraObjects to contain string template

Signed-off-by: Cyril Jouve <jv.cyril@gmail.com>

charts/argo-rollouts/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: v1.4.1
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 2.26.1
+version: 2.27.0
 home: https://github.com/argoproj/argo-helm
 icon: https://argoproj.github.io/argo-rollouts/assets/logo.png
 keywords:
@@ -16,4 +16,4 @@ maintainers:
 annotations:
   artifacthub.io/changes: |
     - kind: added
-      description: Missing permissions to leases under coordination api group
+      description: Allow extraObjects to contain string templates

charts/argo-rollouts/templates/extra-manifests.yaml

@@ -1,4 +1,8 @@
 {{ range .Values.extraObjects }}
 ---
-{{ tpl (toYaml .) $ }}
+{{- if typeIs "string" . }}
+    {{- tpl . $ }}
+{{- else }}
+    {{- tpl (toYaml .) $ }}
+{{- end }}
 {{ end }}