Remove uses of aligned_storage_t

[msimberg]

aligned_storage(_t) is deprecated starting with C++23. Replace uses with alignas(...) unsigned char[...].

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.01% (target: -1.00%)	✅ 100.00% (target: 90.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (4bb041c)	18260	13799	75.57%
Head commit (a9f1d16)	18260 (+0)	13798 (-1)	75.56% (-0.01%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1280)	3	3	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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_{Codacy stopped sending the deprecated coverage status on June 5th, 2024. Learn more}

[msimberg]

I've moved out the reenabling of SBO in any_sender to #1281.

[aurianer]

LGTM thanks!