perf: reduce allocations on trie node decodification

[Oppen]

Motivation

Description

Closes #issue_number

[github-actions]

Lines of code report

Total lines added: 0
Total lines removed: 2
Total lines changed: 2

Detailed view

+-----------------------------------+-------+------+
| File                              | Lines | Diff |
+-----------------------------------+-------+------+
| ethrex/crates/common/trie/node.rs | 244   | -2   |
+-----------------------------------+-------+------+

[github-actions]

Benchmark for 1875624

Click to view benchmark

Test	Base	PR	%
Trie/cita-trie insert 10k	37.5±2.13ms	39.0±1.46ms	+4.00%
Trie/cita-trie insert 1k	3.7±0.07ms	3.7±0.24ms	0.00%
Trie/ethrex-trie insert 10k	57.0±0.87ms	57.0±0.91ms	0.00%
Trie/ethrex-trie insert 1k	6.4±0.05ms	6.4±0.04ms	0.00%

[github-actions]

Benchmark for 337cb2d

Click to view benchmark

Test	Base	PR	%
Trie/cita-trie insert 10k	37.2±1.29ms	37.7±2.16ms	+1.34%
Trie/cita-trie insert 1k	3.7±0.06ms	3.8±0.33ms	+2.70%
Trie/ethrex-trie insert 10k	55.7±1.80ms	55.3±0.41ms	-0.72%
Trie/ethrex-trie insert 1k	6.4±0.03ms	6.4±0.02ms	0.00%