[compiler] Don't assume that upper 32-bit of Int32MulOvfCheck are 0 (6954290) ยท Gerrit Code Review

https://chromium-review.googlesource.com/c/v8/v8/+/6954290

https://x.com/home/status/1968607384562995556

https://x.com/home/status/1968625323915755646

https://x.com/home/status/1968627444488835546