Required products cause infinite loop

[ArthurInnovapps]

Version: 4.80.8

Steps to reproduce:

• Have 2 Products
• Go to the product backend of product A
• Add product B to the Require other products Option
• Activate Automatically add these products to the cart
• Go to the product backend of product B
• Add Product A to the Require other products Option
• Activate Automatically add these products to the cart

At the moment, adding one of these products to the cart in the frontend causes nopCommerce to crash. In my opinion, this is not a configuration issue, since there are products that are intentionally meant to be added to the cart together. For example, when a customer adds Product A, Product B should automatically be added to the cart as well, and vice versa.

[Manuel-Innovapps]

Relates #6908 (which we reported in the past, but not 100% the same)