This fixes how point-of-sale customer loading is customized for Argentina, Spain, and Peru after an underlying system API change. It helps ensure localized POS setups continue loading the right limited customer lists without disruption.

Adapt the `get_limited_partners_loading` method to the new API.

This fixes how the Chilean and Ecuadorian Point of Sale localizations load limited customer records after an underlying API change. It helps prevent customer data loading issues in POS sessions for those localizations, keeping sales workflows reliable.

Adapt the `get_limited_partners_loading` method to the new API.