Azure Functions (and App Service in general) shouldn't show locations where scale operation is not allowed on free/internal subscriptions.

# Issue

Azure Functions (and Azure App Service in general) currently show locations where _scale operation is not allowed_ (_for ex: Brazil South_) for free and internal subscriptions. These locations should not be shown in the Azure Portal menu and through the Azure REST API and SDKs for _Azure internal_ and _Free trial_ subscriptions since deploying there leads to errors/timeouts which makes for bad user experience.

Refer:
https://social.msdn.microsoft.com/Forums/en-US/28490ba9-ad31-491b-a84d-a9761f28142c/the-scale-operation-is-not-allowed-for-this-subscription-in-this-region-try-selecting-different?forum=windowsazurewebsitespreview

https://stackoverflow.com/questions/53790218/error-scale-operation-is-not-allowed-for-this-subscription-in-this-region-when