[WIP] PIM-2709 MongoDB storage for versioning

| Q                    | A
| -------------------- | ---
| Bug fix?             | N
| New feature?         | Y
| BC breaks?           | Y
| CI currently passes? | ?
| Tests pass?          | ?
| Scenarios pass?      | ?
| Checkstyle issues?   | ?
| Changelog updated?   | N
| Fixed tickets        | ?
| Doc PR               | ~