add descheduler helm

deploy/descheduler/templates/NOTES.txt

@@ -0,0 +1,12 @@
+Descheduler installed as a {{ .Values.kind }}.
+
+{{- if eq .Values.kind "Deployment" }}
+{{- if eq (.Values.replicas | int) 1 }}
+WARNING: You set replica count as 1 and workload kind as Deployment however leaderElection is not enabled. Consider enabling Leader Election for HA mode.
+{{- end}}
+{{- if .Values.leaderElection }}
+{{- if and (hasKey .Values.cmdOptions "dry-run") (eq (get .Values.cmdOptions "dry-run") true) }}
+WARNING: You enabled DryRun mode, you can't use Leader Election.
+{{- end}}
+{{- end}}
+{{- end}}