Revert "feat: cleanup pod critical pod annotations feature"

This reverts commit b6d41ee5cc.

cluster/addons/fluentd-elasticsearch/fluentd-es-ds.yaml

@@ -65,6 +65,7 @@ spec:
       # supports critical pod annotation based priority scheme.
       # Note that this does not guarantee admission on the nodes (#40573).
       annotations:
+        scheduler.alpha.kubernetes.io/critical-pod: ''
         seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
     spec:
       priorityClassName: system-node-critical