[14.0][IMP] sale_exception: SO line inherit change to base.exception

[raumschmiede-joshuaL]

Hi.

Because of my other PR OCA/server-tools#3346 I changed sale_exception to use more of base_exception. Some fields are added again to sale.order.line eventhough they already exist on base.exception.

With these changes the note "(Is blocking)" now also appears in the exceptions summary on the SO line. Previously not as sale.order.line defined its own computation for this field.
And with the new inherit it has now the field main_exception_id.

Here I did more changes than in other modules that depend on base_exception to remove the duplicated stuff

[raumschmiede-joshuaL]

@mt-software-de, @jbaudoux, @i-vyshnevska

[mt-software-de]

Thx. One minor remark.
Could you please add the open PR as temporary reference as it is described here. https://github.com/OCA/maintainer-tools/wiki/Use-temporary-reference%28s%29-to-another-pull-request%28s%29

[raumschmiede-joshuaL]

@rousseldenis, can you check this here? This relates to the other PRs I created for repo server-tools.

The 2nd commit with the most changes could be separated by the PRs I mentioned in the commit message. But I didn't do it because the differences would only be in the unit tests to check for the blocking text

[raumschmiede-joshuaL]

On a database with a lot of sale order lines the computation of main_exception_id will take a long time. I will add a migration script to add this field directly to the table without computation. The exceptions are already on exception_ids, and the field is not displayed. No need to set it in the script