This CL changes {descriptionForError} to not immediately return when a {stack}
is not found, but instead try to lookup and append the {message} as well.

The existing logic to build a description in a specific way when the class
of the exception does not match, is retained for backwards compatibility.

Bug: chromium:954017
Change-Id: I9fa1d2807e2877bd988f82b4b57cf329bcd9f61b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1738862
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63111}