[FIX] delivery: speed up delivery costs installation

Due to hefty data the RAM limit gets exhausted.
The process gets killed due to the computed field weight on
- stock.move
- stock.picking
When installing the delivery costs module.

To solve the problem:

We add the column weight to the DB schema.

Ticket ids:
- 3013955
- 2628251
- 3028081

closes odoo/odoo#108872

X-original-commit: c354cf79
Signed-off-by: Arnold Moyaux (arm) <arm@odoo.com>
Signed-off-by: Tiffany Chang <tic@odoo.com>