[AutoPR billing/resource-manager] Add validation transfer API for Microsoft.Billing.#6782

AutorestCI wants to merge 4 commits intorestapi_auto_billing/resource-managerAzure/azure-sdk-for-python:restapi_auto_billing/resource-managerfrom

restapi_auto_6940Azure/azure-sdk-for-python:restapi_auto_6940Copy head branch name to clipboard