Casting between types of the same width

[manopapad]

We need to be able to cast Legate Stores between binary types of the same width. We are talking about an in-place zero-copy conversion, that basically creates an alias to the underlying storage (like a reinterpret_cast in C++).

We would use this e.g. to convert a uint8 array, as comes out of HDF5, to a boolean array.