Array layouts

[klevzoff]

Proposal for new array layout types that allow for static (compile-time) extents and strides. Passes all unit tests.

Inspired by: https://github.com/NVIDIA/cutlass/tree/main/include/cute https://github.com/NVIDIA/cutlass/blob/main/media/docs/cute/00_quickstart.md

The main changes to look at (in order):

• Constant.hpp/testConstant.hpp
• tupleManipulation.hpp/testTupleManipulation.hpp
• Layout.hpp/testLayout.hpp
• then ArraySlice.hpp/ArrayView.hpp/Array.hpp

The type name changes (Array2 etc.) are temporary.

Build times for time ninja -j8 coreComponents/LvArray/all

• develop:

  real    4m51.127s
  user    36m42.070s
  sys 0m58.920s

• feature/klevzoff/layouts:

  real    4m57.517s
  user    36m53.505s
  sys 1m0.265s