Function to translate locations from code to full name

**Is your feature request related to a problem? Please describe.**
In Azure some RPs require providing location display name i.e. `West Europe` instead the resource name: i.e. `westeurope`
Example is CosmosDb locations.

**Describe the solution you'd like**
Forcing RP to change their API would be very hard. So I'd like to have a function that will translate location code to display name.

The issue names no files or tests. Start by locating existing Azure location handling and tests covering Cosmos DB locations; done means providing a callable translation from a code such as `westeurope` to its display name such as `West Europe` for the requested resource scenarios.

Written by the indexing model from the issue text.