Move optimism rpc types to op-alloy

[mattsse]

Describe the feature

we have a few optimism rpc types:

reth/crates/optimism/rpc/src/api.rs

Line 12 in c788b6a

pub struct L2BlockRef {

that should be moved to https://github.com/alloy-rs/op-alloy/tree/main/crates/rpc-types

TODO

• move op rpc types to op-alloy

Additional context

ref ithacaxyz/op-rs#25

[Redidacove]

I am applying to this issue via OnlyDust platform.

My background and how it can be leveraged

I am a student and into Ethereum for a while now participating in Ethereum as a permissionless fellow for implementation of EIP 7732 with potuz and terence as mentors and working on Prysm so can understand the issue well enough.

How I plan on tackling this issue

It's simple refactoring problem just needs to open a pr in op-alloy after adding types in it and then another pr in reth after the first gets merged importing the given types.

[Redidacove]

@mattsse This will be closed by my pr which is currently blocked until next op-alloy release as mentioned by @emhane