[16.0] openupgrade_framework : patched method migrate_module should change load_state for end-migration scripts to be run at install

[metaminux]

Module

openupgrade_framework

Describe the bug

In order to run migration scripts at install also, migrate_module method is patched to modify the module state field.
But in the original method, when dealing with end-migration scripts, state is initialized using load_state field

https://github.com/odoo/odoo/blob/9034602a028fb22fbd139cf41a2f5c71d9d8d032/odoo/modules/migration.py#L106-L110

So we need to modify the load_state field also for end-migration to run at install

To Reproduce

Affected versions: 16.0

Steps to reproduce the behavior:

1. Create a end-migration script in module that is not yet installed but will be (with new dependency in another module)
2. Launch the migration

Expected behavior
The end-migration script should be run