[BUG]: `constant_sequence` can't take an array in C++17

Compared to C++20, the set of types that can be passed as NTTP in C++17 is fairly limited. The problem is that `cuda::__argument::__constant_sequence` takes a single `auto V` NTTP and expects the user to pass the array wrapped by `cuda::std::array`. For example:
```cpp
#include
#include

int main()
{
[[maybe_unused]] cuda::__argument::__constant_sequence const_seq{};
}
```
fails to compile in C++17, see [link](https://godbolt.org/z/rPfKc5eqz).

If we want to make this work, we need to change the type to take the sequence as a variadic NTTP. To simplify the construction, we can add helper factory functions like:
```cpp
template struct constant_sequence { ... };

template
auto make_constant_sequence()
{
// instantiate constant_sequence with elements from _Array and return
}

int main()
{
constexpr int array[]{...};
auto const_seq = make_constant_sequence();
}
```