Product price is not validated

[DanieliMi]

Describe the bug
We have cases with products that do not contain a price in the default scope. Those products are imported without issues. I think it would be good to validate that the price is not empty since it is a required field in Magento.

To Reproduce
Steps to reproduce the behavior:

1. Create a CSV with an empty price field
2. Import the CSV

Expected behavior
The import stops with an validation error.

System:

• OS: Ubuntu 20.04
• Version: 4.1.2