Enhance IfElseIfConstructToSwitch to support "return" statements

Currently the IfElseIfConstructToSwitch recipe does not convert to a switch if any of the parts would return.
However, if all branches would return, we could convert it to and it could be a potential candidate. Only the intermediate phase of having returns in the case is not valid, hence would not be picked up by:

• https://github.com/openrewrite/rewrite-migrate-java/issues/718

    static String formatter(Object obj) {
        if (obj instanceof String s) {
            return s;
        } else if (obj instanceof Long l) {
            return String.valueOf(l);
        } else {
            throw new IllegalStateException("Unexpected value: " + obj);
        }
    }

could become

    static String formatter(Object obj) {
        return switch (obj) {
            case String s -> s;
            case Long l -> String.valueOf(l);
            default -> throw new IllegalStateException("Unexpected value: " + obj);
        };
    }

Start at the IfElseIfConstructToSwitch recipe entry point and review how it handles branches containing return statements. Read the related issue 718 for the existing limitation, then verify the behavior against the Java example in this issue. Done means eligible all-return branches are converted to an equivalent switch expression while intermediate return cases remain excluded.