feat(l1): discv5 enr validation

[ElFantasma]

Motivation
We can validate the fork_id from the ENR when adding the contact since discv5 Nodes messages provide ENRs.

Description

• Reduce code duplication moving the validation to a single place in code.
• Discovery Lookup no longer filter nodes with invalid fork_ids
• Initiator tires connections with valid fork_ids
• Fixed this for discv4 too. (I'll be testing if this affects peer finding performance)

Depends on #5773

Closes #5776

[github-actions]

Lines of code report

Total lines added: 116
Total lines removed: 8
Total lines changed: 124

Detailed view

+---------------------------------------------------+-------+------+
| File                                              | Lines | Diff |
+---------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/backend.rs           | 103   | +103 |
+---------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/discv4/peer_table.rs | 1066  | -2   |
+---------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/discv4/server.rs     | 673   | -5   |
+---------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/discv5/peer_table.rs | 1151  | +12  |
+---------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/p2p.rs               | 24    | +1   |
+---------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/rlpx/eth/mod.rs      | 7     | -1   |
+---------------------------------------------------+-------+------+