[FEA]: Provide vocabulary types to declare host or device `mdspan/mdarray`

[fbusato]

Is this a duplicate?

• [x] I confirmed there appear to be no duplicate issues for this request and that I agree to the Code of Conduct

Area

libcu++

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

It is very common that CUDA functionalities operate in different ways depending on the memory space where they are applied. It is not currently possible to distinguish a mdspan that describe a host or device memory space

Describe the solution you'd like

Provide vocabulary types to declare host or device mdspan/mdarray

Describe alternatives you've considered

No response

Additional context

No response