Update from arkworks 3 --> 4

[z-tech]

What does this PR do?

• it updates dependencies in cargo toml from arkworks 3 to 4 and works changes through the code
• see Remove the no_std workflow #11

[Pratyush]

Nightly needs to fix this along the lines of this PR: arkworks-rs/algebra#790

[z-tech]

@Pratyush hi, got nightly working with Giacomo's help.

I was wondering what the purpose of the no_std workflow is? I could to try to work through those errors but there's ~200 of them and I'd like to do this only if there is a specific purpose 😅. LMK if you can. Thanks.

[z-tech]

@Pratyush hi, got nightly working with Giacomo's help.

I was wondering what the purpose of the no_std workflow is? I could to try to work through those errors but there's ~200 of them and I'd like to do this only if there is a specific purpose 😅. LMK if you can. Thanks.

So for a dependency chain something like ark_poly -> hashbrown -> ahash -> once_cell -> std is there some way I could fix this?