new api for return all ipv4 ipv6 prefixes based on Tag search

[qliu95114]

GET /api/serviceTags//ipAddressPrefixes
GET /api/serviceTags//ipAddressPrefixes?cloudId=

cloudId is optional

Sample

/api/serviceTags/AppServiceManagement.JapanEast/ipAddressPrefixes return all AppServiceManagement.JapanEast only public is matched
/api/serviceTags/AppServiceManagement/ipAddressPrefixes return all AppServiceManagement in public , azurechina and azure usgov
/api/serviceTags/AppServiceManagement/ipAddressPrefixes?cloudid=AzureChinaCloud return all AppServiceManagement in AzureChinaCloud