Common-types for ARM SKUs contract

[TimLovellSmith]

Should there be common-types for SkuLocationInfo and its friends?

Numerous RPs seem to declare/implement list SKUs APIs in line with the ARM common contract for sku capabilities, but I don't think we formalized this in common-types yet.

https://learn.microsoft.com/en-us/rest/api/compute/resource-skus/list?view=rest-compute-2024-03-01&tabs=HTTP

Some possible common types to introduce, cribbing from compute definitions:

ResourceSkuCapabilities | Describes The SKU capabilities object.
ResourceSkuCapacity | Describes scaling information of a SKU.
ResourceSkuCapacityScaleType | The scale type applicable to the sku.
ResourceSkuCosts | Describes metadata for retrieving price info.
ResourceSkuLocationInfo | Describes an available Compute SKU Location Information.
ResourceSkuRestrictionInfo | Describes an available Compute SKU Restriction Information.
ResourceSkuRestrictions | Describes scaling information of a SKU.
ResourceSkuRestrictionsReasonCode | The reason for restriction.
ResourceSkuRestrictionsType | The type of restrictions.
ResourceSkusResult | The List Resource Skus operation response.
ResourceSkuZoneDetails | Describes The zonal capabilities of a SKU.