This adds preliminary support for storing constructed WebAssembly
functions in tables. Note that for now only tables at index #0 are
supported, extending it to other tables indexes will be done as a
follow-up.

R=ahaas@chromium.org
TEST=mjsunit/wasm/type-reflection
BUG=v8:7742

Change-Id: I9aa07813e07f0ceb4eafe37af412b45c7d235722
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1640209
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62210}