make all ops but keccak and things that use Wrapping const fns 💥

[sam0x17]

With the new rust 1.83 changes, we are able to make most zisk ops const fns. The only remaining blockers are on keccak and any ops that make use of Wrapping. The keccak limitation stems from a key limitation right now which is that Vec::as_slice() as a const fn has not been stabilized yet. Once this is stabilized, we can upgrade Mem such that read is a const fn, and then we will be able to make the keccak op itself a const fn.

The Wrapping stuff might be up-gradable now, but we would have to do away with using Wrapping, and I don't know much about this one.

If all of these blockers are removed, the execute / call / etc methods on ZiskOp can all become const fns, which would be a HUGE boon for performance in situations where operands are known at compile-time.