More "write tests" task cases with more complex logic

[bauersimon]

[bauersimon]

package com.eval;

class TypeArrayAccess {
    static int typeArrayAccess(int[] x) {
        if (x[0] == 123) {
            return x[0];
        }

        return 3;
    }
}

[bauersimon]

Problem with that file and symflower test is that we automatically error in case the maven command exits with 1.

[bauersimon]

@ruiAzevedo19 please take over this PR and extract all the things that can already be merged (i.e. everything except the newly added examples) into an early merger. Nice, pretty commits :star_struck: so we can early merge a bunch of stuff. While you are at it please also cherry-pick the refactor+"add service type check" commits from https://github.com/symflower/eval-dev-quality/pull/121/commits.

[bauersimon]

rebased onto #148