Return uint_8 instead of bool from all ckzg functions

[pawanjay176]

I think we might have finally found the root cause of all our windows rust issues.
Thanks to @michaelsproul for helping find this 🙏

blst.h has this redefinition of bool
https://github.com/supranational/blst/blob/78fee18b25e16975e27b2d0314f6a323a23e6e83/bindings/blst.h#L27-L31

Because we import blst.h In c-kzg-4844.h, bool in the c source code is redefined as an int on windows. So in the c interface for all verify_* functions, bool *ok is in fact int *ok.

When generating the rust bindings, bindgen made the stupid mistake of assuming that a bool in C would be a bool in rust. So on calling the underlying C function, rust allocates 1 byte for the bool type where C required 4. This is probably what was causing the undefined behaviour all this time.

Making this PR just to run CI on the issue. There's probably a better way of fixing this in C.

Running this with lighthouse on devnet 8. No crashes so far 🎉

[jtraglia]

This is no longer needed. The root issue was identified. Fixed here:

• Set /std:c11 ccflag for Windows in Rust bindings #354