Since external metrics were added, we weren't running the HPA with
metrics REST clients by default, so we had no bootstrap policy to enable
the HPA controller to talk to the external metrics API.
This change adds permissions for the HPA controller to list and get
external.metrics.k8s.io by default as already done for the
custom.metrics.k8s.io API.
Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>
f794c8bcd4