Move job existance validation into the batch bundle

Defining validation in yml and annotation conflicts and bring unexpected results.

```
Bug fix: yes
Feature addition: no
Backwards compatibility break: no
Unit test passes: yes
Behat scenarios passes: fixes the product import through file upload scenario
Checkstyle issues: no
ChangeLog updated: no
Documentation PR: 
Fixes the following jira: none
```

Mergeable after https://github.com/laboro/platform/pull/789 and laboro ref update