input: Allow to choose console with qemu_input_is_absolute

Although an input is routed depending on the console,
qemu_input_is_absolute() had no mechanism to specify the console.

Accept QemuConsole as an argument for qemu_input_is_absolute, and let
the display know the absolute/relative state for a particular console.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230921082936.28100-1-akihiko.odaki@daynix.com>