Feat: add prometheus_operator_crds in common_crds

The Prometheus Operator CRDs are commonly used for monitoring and are
used by some CNIs (such as Cilium). Kubespray can be installed first,
and the subsequent installation of the operator can be handled by the
user (or later extensions).

Signed-off-by: ChengHao Yang <17496418+tico88612@users.noreply.github.com>