Pulling out common functionality related to dumping scope properties.

Bug: chromium:1093165
Change-Id: I7de377b8812b6181bac21fc0d90c416568b0d640
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2237126
Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68277}