Add support for backendpool of type PodIP

[georgeedward2000]

What would you like to be added:

Added the ability to set the type of backend pool to PodIP.
This action allows the Load balancer attached to the service to route traffic directly to the containers,
instead of routing to AKS nodes and then AKS node routing it to the PODs hosting the service.

To do list:

• Load Balancing Rules Container Load Balancer - LB Rules #8218
• Backend Pool Container Load Balancer - BackendPool #8176
• Network Security Group (NSG) Container Load Balancer - Network Security Group (NSG) #8054
• DiffTracker Container Load Balancer - DiffTracker Integration #8464
• Load Balancer