Some cases and users actually know when their applications will have a
high workload and, therefore, autoscaling support for time based scaling
is a desired feature.
This commit creates the first version of two CRDs called
`ScalingSchedule` and `ClusterScalingSchedule`.
The CRDs describe one or multiples schedules inside them. The schedules
contains the information of when the time based scaling starts, if it
happens once or multiple times, its duration and, a configurable value
that later can be used by HPAs to scale applications.
The only difference between the two CRDs is their scope.
`ClusterScalingSchedule` aims to attend cluster wide schedules, to
multiple applications, while `ScalingSchedule` has to be deployed with
each application into the same namespace.
This commit does not creates any metric, it's a noop change that creates
just the CRD and import tools required to generate the CRD and others
required code, as `deepCopy` functions and clients.
Signed-off-by: Jonathan Juares Beber <jonathanbeber@gmail.com>
