[Bug] New-DbaAvailabilityGroup Missing Implementation of DtcSupport

[gephartr]

Around line 391 there should be a line like the following, but there isn't. The only code for DtcSupport currently is to verify that it is not set for Linux. Of course in addition to the following, it should also validate server version is >= 13.

            $ag.DtcSupportEnabled = $DtcSupport