SI-8898 javap -fun under new style lambdas

To support both -Ydelambdafy strategies, look for both inline
(anonfun) and method (lambda) closure classes.

For method (lambda) style, use the anonfun method that is
invoked by the accessor.

Also, the output of javap must be captured eagerly for
filtering for the current target method.
`.java` :blush: