Tracking: `StateCommitment` abstraction

[frisitano]

Describe the feature

Overview

This issue will be used to plan the implementation of the StateCommitment implementation. The StateCommitment will be used to provide an abstraction over the types associated with the state commitment. This will allow reth to be used with different state representations configured by the user. Initial POC implemented here.

Plan

We will implement the StateCommitment via the following units of work:

• [x] Introduce StateCommitment trait, integrate with NodeTypes and provide MPT implementation. - #11842
• [ ] Introduce StateCommitment types within providers. - #11867
• [ ] Introduce HashedPostStateProvider and refactor methods on HashedPostState and PrefixSetLoader to be generic over the KeyHasher -#11872 , #11874

Refactor codebase to leverage StateCommitment types for all operations:

• [ ] StateRoot
• [ ] StorageRoot
• [ ] StateProof
• [ ] StateWitness
• [ ] KeyHasher
• [ ] ParallelStateRoot

Additional context

https://github.com/paradigmxyz/reth/pull/11786

### Tasks
- [ ] https://github.com/paradigmxyz/reth/pull/11842
- [ ] https://github.com/paradigmxyz/reth/pull/11867
- [ ] https://github.com/paradigmxyz/reth/pull/11872
- [ ] https://github.com/paradigmxyz/reth/pull/11874

[Thegaram]

This could be added to https://github.com/paradigmxyz/reth/issues/11241. @mattsse

[Rjected]

Just added to the tracking issue @Thegaram