webapp:Turn on Application Logging for Web Apps

## Description of the new feature

Is there no way to turn on Application Logging (either Filesystem or Blob) for a Web App using Az.Websites??

I looked in the list [here,](https://docs.microsoft.com/en-us/powershell/module/az.websites/?view=azps-3.1.0) but don't see anything that looks like that's what it's for.

I did find `Enable-AzureWebsiteApplicationDiagnostic`, but it looks like this is for an older version of powershell, and as such, when I try to use it I get this error:

> The term 'Enable-AzureWebsiteApplicationDiagnostic' is not recognized as the name of a cmdlet, function, script file, or operable program

I would think this is something that you ought to be able to do via powershell.

## Proposed implementation details (optional)

This is the command I had tried....isn't there something that will accomplish the same thing with parameters like these?

`Enable-AzureWebsiteApplicationDiagnostic -Name "[my web app]" -BlobStorage -LogLevel "Information" -StorageAccountName "[my storage account]" -StorageBlobContainerName "[my container]"`