Fix Copy-Item progress to only show completed when all files are copied (#20517) (#20544)

src/System.Management.Automation/namespaces/FileSystemProvider.cs

@@ -3569,7 +3569,7 @@ namespace Microsoft.PowerShell.Commands
                     }
 
                     CopyItemLocalOrToSession(path, destinationPath, recurse, Force, null);
-                    if (_totalFiles > 0)
+                    if (Stopping || _copiedFiles == _totalFiles)
                     {
                         _copyStopwatch.Stop();
                         var progress = new ProgressRecord(COPY_FILE_ACTIVITY_ID, " ", " ");