Silence many spurious unitialized variable warnings

added field major matrix permutation to Landau, moved mass matrix creation into main setup method

Merge branch 'knepley/feature-plex-explicit-timestepping' into 'main'

DM+TS: Add support for mass matrices

See merge request petsc/petsc!4683

Fix name of DMPlexTSComputeRHSFunctionFEM()

Plex+DS: Added support for explicit timestepping

DM+TS: Add support for mass matrices
- Added a lumped mass matrix for explicit timestepping
- Add functions for DMTS to manage the mass matrix
- Fix Plex mass matrix creation

fix checkbadSource errors

namespace CUDA kernel

remove attaching batch size to Mat for batch lu solvers (cusporse and Kokkos)

Landau cleaning up

Adams/landau init cleanup

ConvEst: Fix TS monitoring

cleaning up Landau with dynamic allocations

made test set (cpu. kokkos, cuda 'device', for ex2 [kokkos fails]

remove junk

Merge branch 'adams/landau-cuda-opt' into 'main'

Landau optimizations + GPU assembly bug fix

See merge request petsc/petsc!4358

added batching of multiple TSSolve per process for efficiency in applications for processing multiple configuration space vertices simultaneously

add hook for CPU cusparse solves

modified timers

fix 64 bit integer bug with GPU assembly

cuda opts from Peng Wang

plex: DMPlex needs to be named before calling DM{View, Load}()

DMPlexCreateFromFile() takes mesh name as argument