[FEA]: Provide `std::assume_aligned`

[fbusato]

Is this a duplicate?

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Area

libcu++

Is your feature request related to a problem? Please describe.

Pointer alignment is a crucial optimization to get the best performance in many applications. C++20 standardizes the function to inform the compiler of the pointer alignment with std::assume_aligned

Describe the solution you'd like

Provide std::assume_aligned backported to previous c++ standard by using compiler intrinsic

Describe alternatives you've considered

No response

Additional context

No response