Fixed issue where batch removing access policies was only allowed for "core" policies (instead of preventing deletion for core policies)

### What does it do ?

Fixed bad "check" preventing to remove "core access policies" (`!in_array` instead of `in_array`) when "batch deleting" access policies +
Minor CS

### Why is it needed ?

Restore batch deletion function

### Related issue(s)/PR(s)

* #4442