When a product category valuation is set to `real_time`, we use the
stock accounts. However, in the code, to know which account we
should use, we do: "use stock accounts if defined, else use basic
ones" (the best should be "use stock accounts if `real_time`" but
this refactoring task will be done in master). So, here, we need to
ensure that stock accounts are not defined when the valuation is manual.
This is the case when installing `stock_account` module: the
valuations will be set to manual, so we need to force the stock
accounts to `False`. Same when creating a new company, we also need to
ensure that the stock accounts are not defined. This explains the
changes in `_post_load_data`
About changes in `_check_valuation_accouts`, the explanation is in
the method body: the defined values directly depends on the value of
`property_valuation`
Note about test modification: for the tests in `stock_landed_costs`
module, we set the categ to auto so the stock accounts are defined.
Otherwise, when validating the landed costs, it will lead to an error
https://github.com/odoo/odoo/blob/9cd316f038dc95051814ede9474f8f15f7d165df/addons/stock_landed_costs/models/stock_landed_cost.py#L396-L397
OPW-2746384
X-original-commit: 2780c37cfdb8560ac7c725fd27f4fe272f1d3072
Part-of: odoo/odoo#119564
Adrien Widart (awt)
4bccbb175f