Bug#1031566: freecad-common: inspect.getargspec is used in gui_snapper.py which is no longer supported by python >= 3.10

[Petter Reinholdtsen]

I have added this patch to the Debian package git repository, and
discovered in the process that the fix was already applied upstream
in https://github.com/FreeCAD/FreeCAD/pull/8101, commit
fe02d63c8c9b1280978be841d04e68a0a55cceb9.
-- 
Happy hacking
Petter Reinholdtsen