* YJIT: implement call fuzzer script
Attempt to detect bugs in YJIT call implementation.
* Add basic checks for rest, kwrest. Impprove formatting.
* Refactor call fuzzer to make it more powerful and maintainable
Compute checksum of arguments
* Fix checksum computation. Add useless locals as sussged by Alan.
* Add some useless if statements
* Add arguments of different types
* Pass object arguments as well. Force different shapes.
* Compute fuzzing time/speed
* Make use of block param