[REF] Contract Sale Invoicing: split from analytic account

[REF] Contract Sale Invoicing: update translations

[IMP] - Assert that the predecessor is available for new link at uncancel

[RMV] - remove usless changes

[RMV] - Remove usless field recurring_invoices

after the total isolation between contract model and account analytic one.
recurring_invoices which was used to mark analytic account as contract became usless

[IMP] - P3 syntax

[IMP] - use @openupgrade.migrate() and openupgrade.logged_query

[IMP] - drop transient table in migration script

setup/contract/setup.py

@@ -1,3 +1,6 @@
 import setuptools
 
-setuptools.setup(setup_requires=['setuptools-odoo'], odoo_addon=True)
+setuptools.setup(
+    setup_requires=['setuptools-odoo'],
+    odoo_addon=True,
+)