TS tutorials ex30: support mass lumping

minor: Correct typo in glvis test name

The file written is tris, not tets

plexcgns: Enable writing of finite volume meshes

Merge branch 'jrwrigh/dm_box_label' into 'main'

Plex: Add box labeling to simplex, input meshes

See merge request petsc/petsc!7741

Fix UBSan and -Wtype-limits

src/dm/impls/plex/plexdistribute.c:953:22: warning: comparison is always false due to limited range of data type [-Wtype-limits]
953 | if ((PetscInt)ct < 0) {

Fix UBSan and -Wtype-limits

src/dm/impls/plex/plexdistribute.c:953:22: warning: comparison is always false due to limited range of data type [-Wtype-limits]
953 | if ((PetscInt)ct < 0) {
| ^
src/dm/impls/plex/plex.c:9258:29: warning: comparison is always true due to limited range of data type [-Wtype-limits]
9258 | PetscCheck((PetscInt)ct >= 0, PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Cell %" PetscInt_FMT " has no cell type", c);
| ^~

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TS: add TSGetStepResize() to API to inquire about resizing

plex: Print out labels in sorted stratum order

feat(plex): Add DMPlexSetBoxLabel_Internal

Fix usage of deprecated PETSC_DEFAULT

Add support for PETSC_DETERMINE to revert to defaults TS parameters

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

Hence the code needs to be refactored

Introduce PetscCallNull() and PetscCallMPINull() to simplify PETSC_VI

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

Hence the code needs to be refactored

Introduce PetscCallNull() and PetscCallMPINull() to simplify PETSC_VIEWER_XXXX_() routines

Reported-by: James Wright
Thanks-to: Jeremy L Thompson

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Merge remote-tracking branch 'origin/release'

Update file gamg.c

This requires some changes to user FORTRAN code

Pass PETSC_NULL_XXX_ARRAY when passing a NULL as an argument that is expecting an array
Pass PETSC_NULL_ENUM when argument returns an enum instead of

This requires some changes to user FORTRAN code

Pass PETSC_NULL_XXX_ARRAY when passing a NULL as an argument that is expecting an array
Pass PETSC_NULL_ENUM when argument returns an enum instead of PETSC_NULL_INTEGER
Pass arrays (and not scalar values) when the argument is expecting an array; this means replace, for example, the argument v with [v]
Use PetscObjectIsNull(obj) to check if the object is NULL, instead of obj == PETSC_NULL_XXX

The compiler will now automatically prevent you from using the wrong argument type for the first three bullets above
This will also require an update sowing with the new sowing branch this MR is using.

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TS ex2: Replace swarm ex9 with hamiltonian ex2

- Parallelize initialization and primal implementation
- Add test based output, mpiu vs callmpi, fix global particle number
- Fix parallelization for m

TS ex2: Replace swarm ex9 with hamiltonian ex2

- Parallelize initialization and primal implementation
- Add test based output, mpiu vs callmpi, fix global particle number
- Fix parallelization for mixed form, require superlu_dist for test case

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Merge branch 'jolivet/cleanup' into 'main'

Remove unneeded files and update CMake

See merge request petsc/petsc!7585

Remove unneeded files that don't compile

Shorten tests