fix: fix UB in aligned vector

[antoniolocascio]

What ❔

The current design of aligned_vector depends on a theoretical UB. This PR removes it.

Why ❔

Is this a breaking change?

• Yes
• No

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted.

[github-actions]

Benchmark report

Benchmark	Symbol	Base Eff	Head Eff (%)	Base Raw	Head Raw (%)	Base Blake	Head Blake (%)	Base Bigint	Head Bigint (%)
block_19299001	process_block	315,731,032	315,681,490 (-0.02%)	273,065,632	273,016,090 (-0.02%)	410,630	410,630 (+0.00%)	9,023,830	9,023,830 (+0.00%)
block_22244135	process_block	197,597,860	197,585,555 (-0.01%)	170,682,068	170,669,763 (-0.01%)	172,040	172,040 (+0.00%)	6,040,788	6,040,788 (+0.00%)
precompiles	bn254_ecadd	53,268	53,268 (+0.00%)	47,816	47,816 (+0.00%)	0	0 (+0.00%)	1,363	1,363 (+0.00%)
precompiles	bn254_ecmul	728,781	728,781 (+0.00%)	564,593	564,593 (+0.00%)	0	0 (+0.00%)	41,047	41,047 (+0.00%)
precompiles	bn254_pairing	72,336,733	72,336,733 (+0.00%)	57,808,589	57,808,589 (+0.00%)	0	0 (+0.00%)	3,632,036	3,632,036 (+0.00%)
precompiles	ecrecover	479,155	478,103 (-0.22%)	310,643	309,919 (-0.23%)	0	0 (+0.00%)	42,128	42,046 (-0.19%)
precompiles	id	927	927 (+0.00%)	927	927 (+0.00%)	0	0 (+0.00%)	0	0 (+0.00%)
precompiles	keccak	137,579	137,579 (+0.00%)	137,579	137,579 (+0.00%)	0	0 (+0.00%)	0	0 (+0.00%)
precompiles	modexp	31,267,898	31,267,857 (-0.00%)	20,610,078	20,610,037 (-0.00%)	0	0 (+0.00%)	2,664,455	2,664,455 (+0.00%)
precompiles	p256_verify	748,861	748,861 (+0.00%)	470,169	470,169 (+0.00%)	0	0 (+0.00%)	69,673	69,673 (+0.00%)
precompiles	point_evaluation	52,918,413	52,918,413 (+0.00%)	40,570,377	40,570,377 (+0.00%)	0	0 (+0.00%)	3,087,009	3,087,009 (+0.00%)
precompiles	process_block	147,545,807	147,547,176 (+0.00%)	118,079,195	118,066,744 (-0.01%)	5,140	5,160 (+0.39%)	7,346,093	7,349,468 (+0.05%)
precompiles	process_transaction	73,486,786	73,487,752 (+0.00%)	58,784,322	58,791,784 (+0.01%)	160	160 (+0.00%)	3,674,976	3,673,352 (-0.04%)
precompiles	ripemd	8,013	8,013 (+0.00%)	8,013	8,013 (+0.00%)	0	0 (+0.00%)	0	0 (+0.00%)
precompiles	run_tx_loop	146,895,869	146,895,405 (-0.00%)	117,508,617	117,494,653 (-0.01%)	180	180 (+0.00%)	7,346,093	7,349,468 (+0.05%)
precompiles	sha256	13,168	13,168 (+0.00%)	13,168	13,168 (+0.00%)	0	0 (+0.00%)	0	0 (+0.00%)
precompiles	system_init	46,797	46,785 (-0.03%)	46,797	46,785 (-0.03%)	0	0 (+0.00%)	0	0 (+0.00%)
precompiles	verify_and_apply_batch	145,652	145,910 (+0.18%)	109,652	109,910 (+0.24%)	2,250	2,250 (+0.00%)	0	0 (+0.00%)