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

docs: remove SUBMANSEC from example makefiles - and use only MANSEC (it tells what library the tests need)

add PetscSFGetGraphLayout(),

enable fortran interface for PetscSFSetGraphLayout(),
reformat zsfutilsf.c

Rework PetscDeviceContext backends and supporting code:
- Add PETSC_DEVICE_HOST
- Add PetscDeviceAllocate()
- Add PetscDeviceMalloc()
- Add PetscDeviceDeallocate()
- Add PetscDeviceFree()
- Add Petsc

Rework PetscDeviceContext backends and supporting code:
- Add PETSC_DEVICE_HOST
- Add PetscDeviceAllocate()
- Add PetscDeviceMalloc()
- Add PetscDeviceDeallocate()
- Add PetscDeviceFree()
- Add PetscDeviceMemcopy()
- Add PetscDeviceArraycopy()

- Split petscdevice.h into petscdevice_cuda.h and petscdevice_hip.h
- Add petscdevice_cupm.h
- Extend cupm::Interface and cupm::BlasInterface classes
- Add more C++ utility wrappers

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-Wsign-compare fixes

sf: fix PetscSFCompose()

ISBLOCK: ISShift support

Remove braces from one-liners w/o PetscCall()

Remove braces from one-liners

clang-format: convert PETSc sources to comply with clang-format