Support for copy/paste of controls in WinForms Designer

### Environment

N/A

### .NET version

.NET 6

### Did this work in a previous version of Visual Studio and/or previous .NET release?

.NET Framework

### Issue description

According to https://github.com/dotnet/winforms/issues/1831, there were changes in .NET 6 that broke the copy/paste support. However, I couldn't find anything like "copy/paste is no longer supported in .NET Core" in the official documentation. Is there any other recommended way to implement it, or it's an omission from the documentation and there won't be any support for copy/paste now?

### Steps to reproduce

N/A

### Diagnostics

_No response_