* fix(open-in): open a managed server's workspace in VS Code over Remote-SSH (#30332)
* fix(open-in): only open a server workspace over SSH when its files are on that host; validate the SSH link; let process-host quote code.cmd
* test(open-in): expect the workspace ref in the source-control Open in payload
* fix(open-in): pin an SSH-access server's editor host to the settings it was verified on
