chore(l1): remove AccountStateSlim

[azteca1998]

Motivation

Description

[github-actions]

Lines of code report

Total lines added: 86
Total lines removed: 80
Total lines changed: 166

Detailed view

+----------------------------------------------+-------+------+
| File                                         | Lines | Diff |
+----------------------------------------------+-------+------+
| ethrex/crates/common/types/account.rs        | 323   | +86  |
+----------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/peer_handler.rs | 1730  | -4   |
+----------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/rlpx/snap.rs    | 335   | -75  |
+----------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/snap.rs         | 930   | -1   |
+----------------------------------------------+-------+------+

[JereSalo]

I like the solution you've proposed to this.
I think it would be good to add a comment above the definition of AccountStateSlimCodec talking about why it exists, where it's used and its difference with the AccountState struct. Basically that it's used for sending it to peers without sending the whole hashes when they are "empty hashes", which is what happens most of the times within EOAs (only exceptions within EIP-7702). Also add any other comment that you think worth adding.

Also, has this been tested on snapsync yet? I believe there should be no problems but it would be good to test it there.