* Tweaks to pip install

* update bundle-sdist.sh to default to python3

* Increase cmake_minimum_required to 3.16

- that is what kokkos requires

* Replace Kokkos_ENABLE_PTHREAD with Kokkos_ENABLE_THREADS

* VERSION + git submodules

- ensure submodules are cloned when bundling the sdist

* Jenkins + update CMAKE_UNITY_BUILD default

* Update memory and layout defaults for CUDA

* Prefer ENABLE_INTERNAL_KOKKOS when SKBUILD

* Fix VERSION (skipped 0.0.7)

* Fix kokkos_compilation

- added subproject CI test

* decrease view ranks in pip-build

- shortens CI time

* decrease cuda-uvm CI view ranks