CacheSupportedLocations attempts to retrieve the supported locations from the Azure MetaData Service and caches them, for used in enhanced validation.

EnhancedValidate returns a validation function which attempts to validate the location against the list of Locations supported by this Azure Location.

Normalize transforms the human readable Azure Region/Location names (e.g.

NormalizeNilable normalizes the Location field even if it's nil to ensure this field can always have a value.