Add ability to upload from stream, and name remote file differently

[pnorms]

This update adds the ability to upload a file directly from a stream IE:
$Users = Get-ADUser -Filter * | ConvertTo-Csv
$Stream = [IO.MemoryStream]::new([Text.Encoding]::UTF8.GetBytes($Users))
Set-SFTPFile -SessionId $SFTPSession.SessionID -LocalFileStream $Stream -RemotePath "/upload/" -RemoteFileName "Users.CSV"

As well as allow the remote filename to be different from the local filename, IE:
Set-SFTPFile -SessionId $SFTPSession.SessionID -LocalFile "C:\temp\Users.csv" -RemotePath "/upload/" -RemoteFileName "Users2.csv"