Update RolloutConfig to make scale settings reflect the structure of the Capsule CRD

[MatiasFrank]

Currently the scale settings of the RolloutConfig proto does not reflect that of the Capsule CRD. The Capsule CRD has all scale-related settings (horizontal and vertical) grouped under one field Scale. The RolloutConfig has it split between the HorizontalScale field and ContainerSettings.Resources.

[andersjohnsen]

This is being implemented as part of the platform CRDs.