Delegating to the current control depth is valid and rethrows the
exception to the caller. See
https://github.com/WebAssembly/exception-handling/pull/143.

R=clemensb@chromium.org
CC=​aheejin@chromium.org

Bug: v8:8091
Change-Id: I6f14663751736ec6de29eefebfccdf5eb9e955e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2617081
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71974}