Loyalty default product now filtered by user company

[SonoDavid]

Impacted versions: v16

Steps to reproduce:
Create multiple companies and go to the Discounts & Loyalty view.
When choosing program type Buy X Get Y, the default chose product is filled in below.

Current behavior:
The product if not filtered by company_id, resulting in products which are not editable because the user has no rights to edit or remove the company-specific product.

Expected behavior:
The product should be filtered by company_id, suggested change:
first_sale_product = self.env['product.product'].search([('sale_ok', '=', True), ("company_id", "in", [False] + self.env.company.ids)], limit=1)
in the file loyalty_program.py in the addon loyalty.

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