Fix annotation testing could be interrupted

[LemonCaramel]

comment

Also, the issue of failing tests in nested classes has been resolved.

[kennytv]

Not sure if nullmarked actually applies to inner classes, those might be valid fails never mind

[lynxplay]

While technically useless nitpick, this would fail if the annotation was present on the inner class but not on the outer one?

E.g. this may instead have to be something like

private static boolean isClassNullMarked(@NotNull ClassNode clazz, @NotNull Map<String, ClassNode> allClasses) {
    if (isClassNullMarked0(clazz)) return true;

    String parentClass = clazz.nestHostClass;
    while (parentClass != null) {
        final ClassNode parentClassNode = allClasses.get(parentClass);
        if (parentClassNode == null) return false;

        if (isClassNullMarked0(parentClassNode)) return true;

        parentClass = parentClassNode.nestHostClass;
    }
    return false;
}

if we truely care about supporting inner types correctly in this. Not that that is really important lol