Publish-DbaDacPackage - Fix CommandTimeout: check property exists via reflection before setting

CommandTimeout was added to DacServices in newer DacFx versions (16.x+).
Older DacFx (e.g. SQL Server 2019 ships 15.x) does not have this property,
causing 'The property CommandTimeout cannot be found on this object'.

Use reflection to check property exists before setting. Emit a warning when
the installed DacFx version does not support CommandTimeout. Also separate
the property set from the connection try/catch to avoid a misleading
'Error occurred while establishing connection' warning message.

Co-authored-by: Andreas Jordan <andreasjordan@users.noreply.github.com>

Author: github-actions[bot]

public/Publish-DbaDacPackage.ps1

@@ -333,10 +333,16 @@ function Publish-DbaDacPackage {
                 #Create services object
                 try {
                     $dacServices = New-Object Microsoft.SqlServer.Dac.DacServices $connString
-                    $dacServices.CommandTimeout = $CommandTimeout
                 } catch {
                     Stop-Function -Message "Error occurred while establishing connection to $instance" -Category ConnectionError -ErrorRecord $_ -Target $server -Continue
                 }
+                if (Test-Bound -ParameterName CommandTimeout) {
+                    if ($null -ne $dacServices.GetType().GetProperty("CommandTimeout")) {
+                        $dacServices.CommandTimeout = $CommandTimeout
+                    } else {
+                        Write-Message -Level Warning -Message "CommandTimeout is not supported by this version of DacFx. Upgrade SSDT or DacFx to use this parameter."
+                    }
+                }
 
                 try {
                     $null = $output = Register-ObjectEvent -InputObject $dacServices -EventName "Message" -SourceIdentifier "msg" -ErrorAction SilentlyContinue -Action {