Task: Remove logger from the resource manager clients

[jananivMS]

Many of the resource managers under pkg/resourcemanager still have loggers/Telemetry. We should remove the loggers completely from these resource managers so we have logging only from the higher levels.

**Done criteria **
This is the "done" criteria for this task

grep -r "logr.Logger" ./pkg/resourcemanager/ -l

• None of the resource managers have loggers or Telemetry. There is no logging at the lower levels

• Postgre SQL

• Azure SQL

• event Hubs

• Key Vaults

• Redis Cache

• Vnet

• API management

• application insights

(Branched from #432)

[jananivMS]

@buhongw7583c Hong - you can refer to this client here for an example that does not have the logger
https://github.com/Azure/azure-service-operator/tree/master/pkg/resourcemanager/azuresql/azuresqlvnetrule