fix(console): a VNC console connects to the VM its page was opened for

- novncd takes the console token only from its websocket URL. The page
  also put the token in a cookie, one for the whole browser, and novncd
  preferred the cookie: with two consoles open, a tab that (re)connected
  after another console was opened got that other VM.
- novncd opens the VM by its UUID, the VM the access check was made for,
  not by its name, which another VM on the host may carry now.

console/views.py

@@ -150,9 +150,4 @@ def console(request):
                 "Console type '%(type)s' is not supported. Please switch the VM graphics to VNC."
             ) % {"type": console_type}
         response = render(request, "console-vnc-lite.html", locals())
-
-    # Only novncd reads this cookie; JavaScript gets the token from the page.
-    response.set_cookie(
-        "token", token, httponly=True, samesite="Lax", secure=request.is_secure()
-    )
     return response