Incorrect display of map types

[Bevan Arps]

In the generated documentation for Azure Service Operator (ASO), we noticed that the display names of fields with a map type weren't being simplified the same way that other types are.

For example,

On VirtualMachineIdentity_ARM we see a map type with a relative path for the type of map values:

userAssignedIdentities
map[string]./api/compute/v1api20220301.UserAssignedIdentityDetails_ARM

We expected this to display with just the name of the type, given it's in the current package:

userAssignedIdentities
map[string]UserAssignedIdentityDetails_ARM

Slice properties already use this simplified form - several examples can be seen on VirtualMachineInstanceView_STATUS_ARM:

disks
[]DiskInstanceView_STATUS_ARM

extensions
[]VirtualMachineExtensionInstanceView_STATUS_ARM

I've traced the cause of this to the typeDisplayName() function.