PIM-3369 : stops the product import with a detailed notice when issue with fields format

| Q                    | A
| -------------------- | ---
| Bug fix?             | Y
| New feature?         | N
| BC breaks?           | N
| CI currently passes? | Y
| Tests pass?          | Y
| Scenarios pass?      | Y
| Checkstyle issues?*  | N
| PMD issues?**        | N
| Changelog updated?   | Y
| Fixed tickets        | PIM-3369, PIM-3370, PIM-3374, PIM-3375, PIM-3376
| DB schema updated?   |
| Migration script?    |
| Doc PR               |