ECJ reports about non-existing modifiers on a local class in a switch expression

[jarthana]

This is similar to #4241 but here it is about ECJ seeing modifiers that don't exist:

public interface X {
    int i = switch (0) {
        case 2 -> {
            class ParentLocal { // This is rejected
            }
            yield 1;
        }
        default -> {
            yield 0;
        }
    };
}

Here, in the highlighted line, ECJ reports "Illegal modifier for the local class ParentLocal; only abstract or final is permitted".

[srikanth-sankaran]

I'll take a look.