Creates some SO to have more data to display in the product's forecast
report. The purpose is to make the demo of this report easier.
Also, increases the inventoried quantity of the `product_product_10` to
compensate the SO as this product is also used by other app demo data.

task-2058495

[IMP] stock: increase product_product_10 inv. qty.

Demo data product's quantities are no more put in sublocation as by
default, multilocation aren't active.

Also, adapts `test_location_usage` because as we moved quantities from
sublocations to the main stock location, the stock warehouse will have
reserved quantity due to a backorder created by demo data.
In this test, we try to change location as a scrap location, what we
can't do if this location has some reserved quantities.

Task #1970460

Change the use of Inventory Adjustment, notable changes are:

    - Removed filter field: When user creates a new inventory
    adjustment, he can set one or multiple locations and/or products.
    An inventory adjustment will worry only about defined
    locations/products, but if neither product or location was set,
    it'll manage all stock.

    - Inventory Adjustment Lines have their own view instead of be
    listed on the Inventory Adjustment form view.
    Inventory adjustment lines have new color legend:
        - Red: The quantity is outdated.
        - Blue: There is difference between the on hand quantity and the
        counted quantity.
    New inventory lines created by the user are written in bold.

    - User can't modify already existing inventory lines, except for the
    counted quantity.

    - When an inventory line is outdated, the user has the possibility
    to select and update it, that'll recompute the on hand quantity.

    - When an inventory adjustment is validated, it will take in account
    only the difference between the theoretical quantity ('On Hand
    Quantity') and the counted quantity to adjust the quants.

    - When an inventory adjustment is canceled, it will keep its
    inventory lines and won't regenerate them when re-started.

    - When an Inventory Adjustment generates Account Moves, user can now
    find them in a stat button in the Inventory Adjustment form view.

Also, made some changes in demo data to match new requirement.

Task #1935921

Targets commit d3530eb07e24278117ab396ecb86a59deecc312d

Purpose
=======
- The "Customizable Desk" and "Conference chair" products now have some stock in the initial inventory
  to avoid the stock warning when adding these products in a SO through the product configurator.

When the module sale_stock is installed, the MTO route is now by default
available on sale order lines.

We also remove the ability to create routes from sale order lines, as a
salesman will never have to configure new stock routings.