[Feature]: Add warning for users of eventual change of default for "az network lb create" and "az network lb frontend-ip create" #21831
Description
In the latest profile and the profiles that use the same api-version as latest profile, the default public IP used for creation for an LB frontend with "az network lb create" and/or "az network lb frontend-ip create" will be changed from Basic to Standard. In advance of eventual breaking change, would like to add warning for users.
Similar change done for "az vm create" - #18662