Incorrect sub-typing caused some spec tests to fail. The rules in the
spec are here:
https://webassembly.github.io/reference-types/core/exec/modules.html#globals

R=mstarzinger@chromium.org

Bug: v8:7581
Change-Id: Ic0924b98a39395e351fec901c47a9debfe56be9d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1598763
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61314}