test_ansys_units_integration is failing in 25.2

[mkundu1]

clip_factor.get_attr("units-quantity") returns an empty string instead of None. As per the comment in flunits.py::get_si_unit_for_fluent_quantity, this is a regression in settings API.

[hpohekar]

Thanks @mkundu1.

@seanpearsonuk Can we pass this to the Settings API team ?

[seanpearsonuk]

1215865

[hpohekar]

#4573