psp related fixes for rancher-sachet chart

packages/rancher-alerting/rancher-sachet/charts/templates/psp.yaml

@@ -1,3 +1,4 @@
+{{- if .Capabilities.APIVersions.Has "policy/v1beta1/PodSecurityPolicy" }}
 apiVersion: policy/v1beta1
 kind: PodSecurityPolicy
 metadata:
@@ -27,3 +28,4 @@ spec:
   volumes:
     - 'configMap'
     - 'secret'
+{{- end }}

packages/rancher-alerting/rancher-sachet/charts/templates/role.yaml

@@ -1,3 +1,4 @@
+{{- if .Capabilities.APIVersions.Has "policy/v1beta1/PodSecurityPolicy" }}
 apiVersion: rbac.authorization.k8s.io/v1
 kind: Role
 metadata:
@@ -13,3 +14,4 @@ rules:
       - podsecuritypolicies
     verbs:
       - use
+{{- end }}

packages/rancher-alerting/rancher-sachet/charts/templates/rolebinding.yaml

@@ -1,3 +1,4 @@
+{{- if .Capabilities.APIVersions.Has "policy/v1beta1/PodSecurityPolicy" }}
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding
 metadata:
@@ -11,3 +12,4 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: {{ include "sachet.fullname" . }}
+{{- end }}