make reenumeration timeout configurable

[PlasmaHH]

When running under WSL usb devices are forwarded from windows into wsl via usbipd or similar mechanisms.

When updating and reenumering as dfu device this can take significantly longer than the standard timeout the bmputil-cli probe update mechanism expects, especially if the forwarding has to be authorized by the user first.

It would therefore be necessary to control the timeout e.g. via a cmd line argument to make this usable on wsl.