Extra Utility Types, main branch (2023.12.05.)

[krasznaa]

This is step 1 in getting #246 into the repository.

Introduced vecmem::tuple, vecmem::details::disjunction and vecmem::details::negation. All in preparation for the SoA EDM base classes.

• vecmem::details::disjunction is a stand-in for std::disjunction with C++14. (Which is still our minimum requirement for device code!)
• In a similar manner, vecmem::details::negation is a stand-in for std::negation in device code.
• vecmem::tuple is a shameless copy of detray::tuple. With very slight modifications for C++14 compatibility.

Not sure yet how I'll make the rest of #246 digestible, but for now let's just get this reviewed. Then we'll see about the rest. :wink:

[krasznaa]

Only noticed with a delay that the constructors of vecmem::tuple should be simplified a bit. Just as for vecmem::data::vector_view and friends, if we want to use such types directly as parameters of a SYCL kernel, they have to have "proper default constructors".

And this change seemingly also brought a build failure forward. :thinking: Interesting that Clang (which is what I tested this change with) didn't complain about that variable. :thinking: