[FIX] mrp: use 'qties' context based cache in _compute_quantities_dict

Regression introduced here: fba9c9f32

closes odoo/odoo#88449

X-original-commit: 83c7017f07d829f0dc061a310026979db020bc77
Signed-off-by: William Henrotin (whe) <whe@odoo.com>
Signed-off-by: Arnold Moyaux <arm@odoo.com>

addons/mrp/models/product.py

@@ -200,8 +200,8 @@ class ProductProduct(models.Model):
                     continue
                 rounding = component.uom_id.rounding
                 component_res = (
-                    res.get(component.id)
-                    if component.id in res
+                    qties.get(component.id)
+                    if component.id in qties
                     else {
                         "virtual_available": float_round(component.virtual_available, precision_rounding=rounding),
                         "qty_available": float_round(component.qty_available, precision_rounding=rounding),