Hoist function pointer call out of loop, compilers will not be able to deduce it does not change

Tell clang-format to treat khash_t as a typename

add PetscViewerHDF5GetDMPlexStorageVersion{Reading,Writing},

replace DMPlexStorageVersionGet_Private
and DMPlexStorageVersionSetUpWriting_Private;
stash version in PetscViewer

source code format changes due to .clang-format changes

Transform all header-guards into ifndefs to make clang-format ignore them for preprocessor indentation

Fix a variety of simple things associated with Matlab

Incorrect spelling
Out-dated documentation
Formatting

Commit-type: housekeeping
Reported-by: Jose Roman

No longer a need for a seperate --with-matlab-engine since their are not fragile MATLAB version dependent libraries

that may be work for some users

/spend 20m

Fixes for PETSc matlab interface code and test examples

Commit-type: portability-fix, testing-fix
Reported-by: Jose Roman

Work around bug in Matlab Engine 2021b support, improve formatting of matlab engine tutorial example

Commit-type: housekeeping
/spend 20m

Merge branch 'haplav/feature-hdf5-group-additions' into 'main'

PetscViewerHDF5 group handling additions

See merge request petsc/petsc!5640

Remove parent, parentid, flops, time, mem, and memchildren. Deprecate PetscLogObjectParent(), PetscLogObjectMemory(), and PetscNewLog()

PetscViewerHDF5HasGroup: minor manpage fix

add PetscViewerHDF5WriteGroup()

PetscViewerHDF5OpenGroup: add inarg path,

employ PetscViewerHDF5GetGroup()

PetscViewerHDF5GetGroup: always return absolute path.

Replace PetscViewerHDF5GetAbsolutePath_Internal().
The original implementation is now PetscViewerHDF5GetGroup_Internal()

makefile: fix typo - petsckdir.mk -> petscdir.mk