Fixes uint64_t being truncated to a size_t (uint32_t) when trying to create a memory object in wasm
Pull request: https://github.com/WebKit/WebKit/pull/3275
Committed 253399@main (3866ba779bf1): <https://commits.webkit.org/253399@main> Reviewed commits have been landed. Closing PR #3275 and removing active labels.
<rdar://problem/98598580>