[Feature]: Store tenant name in AzureRM context

[abaddon82]

Description of the new feature

Would it be possible to return the tenant name (just not its ID) when running Get-AzContext?

The use case is that when you are working with multiple tenants, it's a lot faster to check the name than the ID. The Get-AzContext cmdlet is also a lot faster than the Get-AzTenant for instance, so it would be useful if one wants to make it a part of the prompt as well.

Proposed implementation details (optional)

No response

[isra-fel]

Thanks for the feedback!
cc @msJinLei @BethanyZhou let's look into this.