Add get_status wrapper with last_query status for macros It is sometimes useful to determine the state of the probe from a macro. If the probe is connected to an endstop pin, the results can be obtained via QUERY_ENDSTOPS but if a physical endstop is in use in addition to the probe the probe state cannot be obtained. This change allows one to use QUERY_PROBE and then access the printer.probe.last_query object to obtain the state.
Signed-off-by: Paul McGowan <mental405@gmail.com>