Array iterators don't work when copied from host to device

[publixsubfan]

When working on #1646, one issue I discovered was passing axom::Array::begin() and axom::Array::end() to FlatMap::insert resulted in memory errors on CUDA/HIP. This is because the current implementation takes a pointer to axom::Array:

axom/src/axom/core/ArrayIteratorBase.hpp

Lines 40 to 41 in 915db00

	public:
	using ArrayPointerType = ArrayType*;

axom/src/axom/core/ArrayIteratorBase.hpp

Line 60 in 915db00

ArrayPointerType m_arrayPtr {nullptr};

If the Array instance is allocated on the stack, i.e. any Array variable defined in a function, this results in an access to host-only memory. We should evaluate if it would be more appropriate to store an ArrayView as the "pointer."