[FIX] Correct floating number comparison for min_quantity orderpoint in scheduler

Fix basic floating point math issue in procurement scheduler when comparing
current quantity with orderpoint minimum quantity. In certain cases floating
point comparison could result in e.g 400.0 < 400.0 == True due to typical
floating point comparison issues, as Odoo doesn't use Decimal types where the
issue doesn't exist.
Use float_compare helper to solve this with floating point type.
No. You will need .quantize() instead, and you actually know it's only really really necessary when division is done. I also edited by previous note. I don't understand how it is not common sense that using floating point is completely utterly wrong in a business system and a historical mistake, and just migration plans aren't the question here.