[FIX] stock: get product qty in specific location

When getting the on hand quantity of a product in a specific location,
the result may be incorrect.

To reproduce the issue:
1. In Settings, enable "Storage Locations"
2. Create a storable product P
3. Update its quantity:
    - 5 x P at WH/Stock/Shelf 1
4. Inventory > Reporting > Inventory Report
5. Apply the following filters:
    - Product: P
    - Location: WH/Stock/Shelf 1
    - => There is a line with 5 x P at WH/Stock/Shelf 1, which is
correct
6. Click on Inventory at Date, set <Today>, confirm
7. Apply the following filters:
    - Product: P
    - Location: WH/Stock/Shelf 1

Error: There is a line for P but its on hand quantity is 0, which is
incorrect (should be 5)

In the first search, we let the ORM handle the domain conversion. When
searching for `('location_id', 'ilike', 'WH/Stock/Shelf 1')`, it will
use the `_rec_name` of the model to find the record. In case of a stock
location, its `_rec_name` is the field `complete_name`:
https://github.com/odoo/odoo/blob/94a8ad3fae914b046064bb7ce17572be8280f6e0/addons/stock/models/stock_location.py#L19



However, for the second search, when getting the on-hand quantity of the
product, we force the use of the field `name` to find the location.
Because the `name` of the searched location is "Shelf 1", using
"WH/Stock/Shelf 1" as key search will not work.

OPW-2920904

closes odoo/odoo#97091

X-original-commit: 9a651e13
Signed-off-by: William Henrotin (whe) <whe@odoo.com>
Signed-off-by: Adrien Widart <awt@odoo.com>