Add cpanato to the prow oncall team.
Add cpanato to the prow oncall team.

Scope of intervention is only scoped the build environments owned by the
community and not the Google infrastructure.

Signed-off-by: Arnaud Meukam <96190fcd0798f0afa72279990e31ddc33e4f2ea2@gmail.com>

kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io