perf: quick and dirty key-value for diff layers

[Oppen]

Motivation

Description

Closes #issue_number

[github-actions]

Lines of code report

Total lines added: 40
Total lines removed: 6
Total lines changed: 46

Detailed view

+-------------------------------------------+-------+------+
| File                                      | Lines | Diff |
+-------------------------------------------+-------+------+
| ethrex/crates/common/trie/db.rs           | 92    | +3   |
+-------------------------------------------+-------+------+
| ethrex/crates/common/trie/trie.rs         | 946   | -6   |
+-------------------------------------------+-------+------+
| ethrex/crates/storage/trie_db/layering.rs | 163   | +25  |
+-------------------------------------------+-------+------+
| ethrex/crates/storage/trie_db/rocksdb.rs  | 219   | +12  |
+-------------------------------------------+-------+------+

[github-actions]

Benchmark for 1208d52

Click to view benchmark

Test	Base	PR	%
Trie/cita-trie insert 10k	36.1±1.80ms	36.0±2.20ms	-0.28%
Trie/cita-trie insert 1k	3.5±0.02ms	3.6±0.21ms	+2.86%
Trie/ethrex-trie insert 10k	50.1±2.41ms	52.6±2.35ms	+4.99%
Trie/ethrex-trie insert 1k	6.4±0.03ms	6.4±0.07ms	0.00%