Currently, `ClassLoaderDataGraph::clear_claimed_marks` is called at the end of marking phase, but its purpose is to clear all claim-marks used during marking and adjust-pointer phases. For the sake of restoring those claim-marks to initial state (zero) after full-gc, it would make more sense to perform such clearing at the end of full-gc, like other STW GCs.

Note that the current placement doesn't cause any correctness issues. From the correctness perspective, it's safe to call `clear_claimed_marks` any where inside the full-gc pause.