Provide way to define/override Vino sub-cluster VM flavor definitions & apply to STL3

[eak13]

Sub-cluster VM flavors are defined in https://github.com/airshipit/vino/blob/master/config/manager/flavors.yaml for ViNO to use when creating the sub-cluster VMs. We need the ability to define/override the control plane & worker flavor settings at least at a type level within Treasuremap and then have them consumed by ViNO at sub-cluster creation time.

Specifically for STL3, we need the following configurations:

Tasks:

1. Provide manifests/template where user can define control plane & work node VM definitions based on https://github.com/airshipit/vino/blob/master/config/manager/flavors.yaml. At a minimum, this will be needed for the multi-tenant type.
2. Provide a mechanism for passing the VM definitions to ViNO to be used in defining the sub-cluster VMs
3. Validate ViNO defines the sub-cluster VMs using the specified flavors in STL3

[drewwalters96]

Ready for review: https://review.opendev.org/c/airship/treasuremap/+/795187

[drewwalters96]

The current approach will work with the new version of ViNO. This change is ready for review but has been rebased on Kostiantyn's uplift PS: https://review.opendev.org/c/airship/treasuremap/+/796014