GPU Assembly AtPoints (#1833)

* cuda - AtPoints diagonal assembly for gen

* hip - AtPoints diagonal assembly for gen

* pc - use subops for LinearAssemble[Add]Diagonal if composite

* gen - turn mo

GPU Assembly AtPoints (#1833)

* cuda - AtPoints diagonal assembly for gen

* hip - AtPoints diagonal assembly for gen

* pc - use subops for LinearAssemble[Add]Diagonal if composite

* gen - turn more numbers into named variables

* gen - fix alignment for assembly

* gen - check for only one active basis in/out

* HIP gen at points syntax error fixes

* hip - embarassing fix

* gen - add Tab helper to manage indentation

---------

Co-authored-by: Zach Atkins <Zach.Atkins@colorado.edu>

show more ...