perf(l1): validate blobs only once

[Oppen]

Motivation

KZG signature verification takes a lot of time in flamegraphs.

Description

There are two changes here:

1. A fix to behavior, we should reject peers that send us unsolicited
   responses;
2. An optimizatino, we no longer revalidate a blob transaction that
   passed the verifications in PooledTransactions::validate_requested.

The first one might be a bit controversial. I want feedback on it and
will probably resend as a separate PR after. In my view, the current
behavior is an attack vector for DoS.

[github-actions]

Lines of code report

Total lines added: 29
Total lines removed: 0
Total lines changed: 29

Detailed view

+--------------------------------------------------------+-------+------+
| File                                                   | Lines | Diff |
+--------------------------------------------------------+-------+------+
| ethrex/crates/blockchain/blockchain.rs                 | 1377  | +21  |
+--------------------------------------------------------+-------+------+
| ethrex/crates/networking/p2p/rlpx/connection/server.rs | 1045  | +8   |
+--------------------------------------------------------+-------+------+