Where appropriate replace the use of std::array with Vector

[EmilyBourne]

Where appropriate replace the use of std::array with Vector as defined here:

gyselalibxx/src/utils/ddc_aliases.hpp

Lines 80 to 101 in 37a2d44

	template <class ElementType, class... Dims>
	class Vector : public ddc::detail::TaggedVector<ElementType, Dims...>
	{
	public:
	/**
	* @brief A constructor for a Vector to build from individual elements:
	* E.g. Vector<double, X, Y>(1.0, 2.0)
	*
	* or to build from component vectors
	* E.g. Vector<double, X, Y>(vec_x, vec_y)
	*
	* @param[in] p The element of the Vector.
	*/
	template <class... Params>
	KOKKOS_FUNCTION Vector(Params... p) : ddc::detail::TaggedVector<ElementType, Dims...>(p...)
	{
	}
	};
	/// A type describing a vector whose elements are doubles e.g. (E_x, E_y)
	template <class... Dims>
	using DVector = Vector<double, Dims...>;

This issue should be tackled after #38. All functions operating on Vectors should then include static_assertions to ensure that they are correctly mixing covariant/contravariant objects