Minor cleanup of Fortran binding stuff to simplify future maintainance

There is no distinction between F90 and non-F90 code so combine ftn-custom and f90-custom directories and fortranimpl.h and f90

Minor cleanup of Fortran binding stuff to simplify future maintainance

There is no distinction between F90 and non-F90 code so combine ftn-custom and f90-custom directories and fortranimpl.h and f90impl.h files. Also move uses of f90 to ftn when simple

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Fortran 90: fully embrace After 34 years!

- deprecate use of 'F90' in Fortran function names
- use Fortran pointers when appropriate
- the new Fortran API is not backward compatible with previous ve

Fortran 90: fully embrace After 34 years!

- deprecate use of 'F90' in Fortran function names
- use Fortran pointers when appropriate
- the new Fortran API is not backward compatible with previous versions!
- also clean up inconsistent PETSc code detected by new Fortran generation tools
- drop use of bfort
- automatically generate all the Fortran PETSc objects, enums etc from the include files
- generate most of the Fortran interface definitions and functions from the source code
- simplify the number and organization of Fortran modules

Co-authored-by: Jose E. Roman <jroman@dsic.upv.es>

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some code fixes

sf: Add fallthrough comment to KDTreeCreate

This line should fallthrough correctly, but requires a comment at the
end of the line to signal that the fallthrough is intended.

Fix -Wstrict-prototypes

petsc/src/vec/is/utils/kdtree.c:60:51: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
60 | static PetscErrorC

Fix -Wstrict-prototypes

petsc/src/vec/is/utils/kdtree.c:60:51: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
60 | static PetscErrorCode PetscKDTreeRegisterLogEvents()
| ^
| void
1 warning generated.

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KDStem: Use uint8_t for axis and char for boolean

IS: Add PetscKDTree

Co-authored-by: Barry Smith <bsmith@mcs.anl.gov>

Brain dead fixes for useless casts

Fix ranlib warnings 'file has no symbols'

These warnings appear in macOS when configured --with-shared-libraries=0

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-nosh

Fix ranlib warnings 'file has no symbols'

These warnings appear in macOS when configured --with-shared-libraries=0

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(sectionhdf5.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(zhdf5io.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(hdf5io.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(aijhdf5.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(baijfact81.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(densehdf5.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(feceed.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(fvceed.o) has no symbols
/Library/Developer/CommandLineTools/usr/bin/ranlib: file: arch-darwin-c-debug-noshared/lib/libpetsc.a(plexhdf5xdmf.o) has no symbols

Includes the removal of unnecessary custom fortran stubs.

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Fix -Wshorten-64-to-32

src/vec/is/utils/hdf5/hdf5io.c:120:46: warning: implicit conversion loses integer precision: 'PetscInt' (aka 'long long') to 'int' [-Wshorten-64-to-32]
120 | PetscCallMP

Fix -Wshorten-64-to-32

src/vec/is/utils/hdf5/hdf5io.c:120:46: warning: implicit conversion loses integer precision: 'PetscInt' (aka 'long long') to 'int' [-Wshorten-64-to-32]
120 | PetscCallMPI(MPI_Allgatherv(lcind, cmap->n, MPIU_INT, ctx->cind, counts, displs, MPIU_INT, comm));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/petsclog.h:541:123: note: expanded from macro 'MPI_Allgatherv'
541 | (PetscAddLogDouble(&petsc_gather_ct, &petsc_gather_ct_th, PetscMPIParallelComm(comm)) || MPI_Allgatherv((sendbuf), (sendcount), (sendtype), (recvbuf), (recvcount), (displs), (recvtype), (comm)))
| ~~~~~~~~~~~~~~ ^~~~~~~~~
include/petscerror.h:784:102: note: expanded from macro 'PetscCallMPI'
784 | #define PetscCallMPI(...) PetscCallMPI_Private(PetscStackPop, SETERRQ, PETSC_COMM_SELF, __VA_ARGS__)
| ^~~~~~~~~~~
include/petscerror.h:774:32: note: expanded from macro 'PetscCallMPI_Private'
774 | ierr_petsc_call_mpi_ = __VA_ARGS__; \
| ^~~~~~~~~~~

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IS+HDF5: Add run-length compression for arithmetic progressions to IS I/O
- Add DMPlexGetDepthStratumGlobalSize()
- Add name and compression info to HDF5ReadCtx
- Add compression argument to PetscVie

IS+HDF5: Add run-length compression for arithmetic progressions to IS I/O
- Add DMPlexGetDepthStratumGlobalSize()
- Add name and compression info to HDF5ReadCtx
- Add compression argument to PetscViewerHDF5ReadSizes_Private() and PetscViewerHDF5Load_Internal()
- Gather compressed info to all procs when loading
- Set name for local coordinates
- Add logging
- Add -is_view_compress to turn off compression
- Add -dm_plex_view_coordinate_section to just output coordinates
- Add -dm_plex_view_labels to turn off label output
- Support loading coordinates without section

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Remove unneeded parentheses

Fix -Wshorten-64-to-32

Fix MPIU_* routines to always return MPI error codes and thus be usable with PetscCallMPI()

Introduce MPIU_Count to be used when MPI_Count is not available