perf(l1): avoid copying bytecode

[MegaRedHand]

Motivation

We are spending time copying bytes from the database when reading an account's code. This isn't ideal, since RocksDB already allows us to borrow the bytes without copying them.

Description

This PR implementation adds an owned version of the DBPinnableSlice type that RocksDB has, which packs it with a reference to the DB and allows us to wrap it with Bytes and treat it in a generic manner.

[github-actions]

Lines of code report

Total lines added: 35
Total lines removed: 0
Total lines changed: 35

Detailed view

+-------------------------------------------+-------+------+
| File                                      | Lines | Diff |
+-------------------------------------------+-------+------+
| ethrex/crates/storage/store_db/rocksdb.rs | 1687  | +35  |
+-------------------------------------------+-------+------+

[github-actions]

Benchmark Block Execution Results Comparison Against Main

Command	Mean [s]	Min [s]	Max [s]	Relative
base	59.690 ± 0.296	59.312	60.190	1.00 ± 0.01
head	59.656 ± 0.214	59.376	60.014	1.00

[MegaRedHand]

Since we added the code cache in #5307, this isn't needed anymore