[Synapse] Fix an error not calling base.BeginProcessing (#27643)

Author: YanaXu

src/Synapse/Synapse/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 
 ## Upcoming Release
+* Fixed an error of not correctly setting the cmdlet context
 
 ## Version 3.2.0
 * Supported copyComputeScale and pipelineExternalComputeScale in `Set-AzSynapseIntegrationRuntime` Command

src/Synapse/Synapse/Commands/DataPlaneCommands/Artifact/WorkspacePackages/SynapseDataMovementCmdletBase.cs

@@ -95,6 +95,7 @@ protected bool EnableMultiThread
 
         protected override void BeginProcessing()
         {
+            base.BeginProcessing();
             if (!AsJob.IsPresent)
             {
                 DoBeginProcessing();