Payroll salary rules were reorganized so their names can use Odoo's standard translation process instead of a temporary workaround. This improves consistency across country-specific payroll modules and removes outdated Belgian payroll rules, while also preventing an issue in Mexican payroll amount calculations.

Purpose
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Permit translation of all rules by removing all copied ones
also revert the change made by the framework because  typo was present
in l10n_be remove an old rule (inactive for more than 2years)

task-3844686