bytes: IndexByte can return -4294967295 when memory usage is above 2^31 on js/wasm [1.22 backport] #68475
Description
@randall77 requested issue #65571 to be considered for backport to the next 1.22 minor release.
@gopherbot please open backport issues.
This bug causes {bytes,string}.Index functions to return wrong results when used with very large arguments.