This fixes the case where a table entry contains a function constructed
via {WebAssembly.Function} and is then read out via a runtime function
from the table.

R=ahaas@chromium.org
TEST=mjsunit/regress/wasm/regress-crbug-1002388
BUG=chromium:1002388

Change-Id: Ic0a9a544baaf37e68cd22eb91f2ef0bdf5fa5842
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1795352Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63709}