chore: replaced anvil hardforks with alloy hardforks

[Rimeeeeee]

fixes #10609
removed redundant EthereumHardfork and OptimismHardfork
added standalone fxns spec_id_from_optimism_hardfork, spec_id_from_ethereum_hardfork and ethereum_hardfork_from_block_tag for support
added tests to test standalone fxns

[mattsse]

great start
looks like we also need the inverse of chain +u64 -> Option<Hardfork>?

let's do a rewrite of

impl<T: Into<BlockNumberOrTag>> From<T> for EthereumHardfork {

as regular fn here first and then we move this to the hardforks crate

[zerosnacks]

Lgtm! Pending final upstream changes in alloy-hardforks

Thanks @Rimeeeeee!

[mattsse]

lgtm