[Feature] MCS: Traffic manager resource identifiers need to be readable (not UUIDs)

[sjwaight]

When interacting with TrafficManagerBackend or TrafficManagerProfile CRs any references to Traffic Manager instances should use human readable Traffic Manager resource names and not render resource IDs (UUIDs).

[zhiying-lin]

The reason of using uuid is to solve the name conflict issue, especially when we introduce BYO resource group/profile. The atm resources are supposed to be managed by our controllers, instead of human. For easier debugging/troubleshooting, it should be addressed in #237 to use the azure resource id returned in the status.

Discussed with @circy9 and agreed on keeping the current behavior.