Add proposal for GetPreferredAllocations() to TopologyManager KEP
Add proposal for GetPreferredAllocations() to TopologyManager KEP

This proposal allows a device plugin to forward lists of preferred
allocations to the `devicemanager` so it can incorporate this
information into its `TopologyHint` generation for shared NUMA affinity
as well as help influence its final allocation decision once all
`TopologyHint`s have been merged.

kubernetes/enhancements,kubernetes/enhancements,kubernetes/enhancements