Cleanup: Replace ABS/SQUARE/CUBE with function calls

While it might be handy to have type-less functionality which is
similar to how C++ math is implemented it can not be easily achieved
with just preprocessor in a way which does not have side-effects on
wrong usage.

There macros where often used on a non-trivial expression, and there
was at least one usage where it was causing an actual side effect/bug
on Windows (see change around square_f(sh[index++]) in studiolight.c).

For such cases it is handy to have a function which is guaranteed to
have zero side-effects. The motivation behind actually removing the
macros is that there is already a way to do similar calculation. Also,
not having such macros is a way to guarantee that its usage is not
changed in a way which have side-effects and that it's not used as an
inspiration for cases where it should not be used.

Differential Revision: https://developer.blender.org/D7051

source/blender/python/mathutils/mathutils_bvhtree.c

@@ -493,7 +493,7 @@ static PyObject *py_bvhtree_find_nearest_range(PyBVHTree *self, PyObject *args)
     struct PyBVH_RangeData data = {
         .self = self,
         .result = ret,
-        .dist_sq = SQUARE(max_dist),
+        .dist_sq = square_f(max_dist),
     };
 
     BLI_bvhtree_range_query(self->tree, co, max_dist, py_bvhtree_nearest_point_range_cb, &data);