fix(descheduler): Fix failed cronjobs

This patch should resovled the issue of failed descheduler cronjobs when
the descheduler binary is exiting unexpected. In the issue linked below,
some descheduler contributors recommend to use the `Deployment` kind for
descheduler, since that's what descheuler is optimised for nowadays. The
Helm chart just hasn't caught up yet.

References:
https://github.com/kubernetes-sigs/descheduler/issues/728

infrastructure/kube-system/descheduler.yaml

@@ -25,6 +25,7 @@ spec:
       version: 0.23.1
   interval: 5m
   values:
+    kind: Deployment
     resources:
       requests:
         cpu: 100m