An initial value for Table.grow is supported by the core spec and does
not depend on a proposal, see [1].

[1] https://webassembly.github.io/spec/js-api/index.html#tables

R=thibaudm@chromium.org

Bug: v8:12227
Change-Id: Ia4f16adc76a0422b2211c069614929a1a70afa76
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3164979Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76905}