[maglev] Don't constant-fold an Int32 multiply whose product is -0

TryFoldInt32BinaryOperation(int32_t, int32_t) folded cst_left *
cst_right whenever the product did not overflow, including cases such as
-1 * 0, whose result must be -0 rather than +0.

Bail out of the fold when the product is a negative zero, letting
Int32MultiplyWithOverflow handle the deopt instead, matching what the
kNegate sibling fold in a6b7238b3b6 does.

TAG=agy

Fixed: 563238900
Change-Id: If111ecd213af8935f91dba27bf982b5d6a6a6964
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/8423789
Reviewed-by: Jakob Linke <jgruber@chromium.org>
Commit-Queue: Marco Vitale <mrcvtl@chromium.org>
Cr-Commit-Position: refs/heads/main@{#109978}