Support more environments with libyafl

[take-cheeze]

https://github.com/kyle-github/libyafl

[take-cheeze]

I'm facing some issue in SEGV in std::function::target with libcxx+no-rtt environment like macos

[samyeyo]

I can confirm that coroutine based Lua scripts, compiled with clx, are crashing on macOS ARM64.
It's a good idea to look for third party (if possible tiny) library for similar ucontext switch, or maybe exploring with C++ coroutines

[take-cheeze]

Boost.Context was another candidate but libyafl seems to be more maintained and tested.
I'm also interested using c++20 coroutines too. But it's only stackless coroutine so may not fit current emitted c++ code.

I'd like to have working CI for at least Windows and macOS to land this PR so keeping to draft for a while

[samyeyo]

I think it might be done with just single lines of asm on ARM64 without third party library... I am currently on it

[samyeyo]

The ARM64/macOS ucontext‑like implementation is now working 👍
It switches stacks and restores the full register context using only a few assembly instructions.
I still need to run additional tests and validation before committing it.