PIM-3319: Added abstract class to make code more clean

Refactoring

| Q                    | A
| -------------------- | ---
| Bug fix?             | No
| New feature?         | No
| BC breaks?           | No
| CI currently passes? | Yes
| Tests pass?          | Running
| Scenarios pass?      | Running
| Checkstyle issues?*  | No
| PMD issues?**        | No
| Changelog updated?   | No
| Fixed tickets        | -
| DB schema updated?   | -
| Migration script?    | -
| Doc PR               | -
pretty sure (to double check) that we don't use StringFilter for fields, only for attributes, so we could implement only AttributeFilterInterface and remove the supportFields