Sale delivery date is ignored when after the lead time of the product

#9307 (closed) added the delivery date on sales but this date is ignored when it is before the lead time of the product.

Steps to reproduce:

1. Create a product and set a lead time of 10 days.
2. Create a sale which includes the mentioned product.
3. Check that delivery date of the line is today + 10 days.
4. Update the sale shipping date to tomorrow

Current behaviour:

• The delivery date of the line is today + 10days

Expected behaviour:

• The delivery date of the line is tomorrow