Merge branch 'barry/2024-04-29/add-fortran-enums' into 'main'

Major updates to Fortran interface

See merge request petsc/petsc!7517

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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Merge branch 'jacobf/2023-08-17/header-guard-check' into 'main'

Check header guards

See merge request petsc/petsc!6822

Convert all header guards to pragma once

Merge branch 'jolivet/fix-Wzero-as-null-pointer-constant' into 'main'

Fix -Wzero-as-null-pointer-constant

See merge request petsc/petsc!6760

Fix -Wzero-as-null-pointer-constant

Merge branch 'tisaac/feature-log-handler' into 'main'

Deglobalize logging into PetscLogHandler and PetscLogState

See merge request petsc/petsc!6709

Profiling: Switch logging over to the new PetscLogHandler infrastructure

- Move data structures only needed by the default logger now (Action,
Object) to logdefault.c

- Create petsclogdeprecated.

Profiling: Switch logging over to the new PetscLogHandler infrastructure

- Move data structures only needed by the default logger now (Action,
Object) to logdefault.c

- Create petsclogdeprecated.h and petsc/private/logimpldeprecated.h
for publicly visible symbols that are now deprecated. Yes,
lots of symbols in petsc/private/logimpl.h were not only visible
but had docstrings.

- The macros PetscLogEventBegin(), PetscLogEventEnd(),
PetscLogEventSync(), PetscLogObjectCreate(), and
PetscLogObjectDestroy() now looks through the log handlers
in PetscLogHandlers, sees if they have they appropriate
callbacks (Exposed in PetscLogHandlerHot), and calls them.
Up to 4 log handlers can run simultaneously.

- All queries about the registered things now go through
petsc_log_state.

- Output functions dispatch to the appropriate PetscLogHandler

- There is no need for xmllogevent.c, xmlviewer.c, eventlog.c,
classlog.c, and stagelog.c anymore. Some orphaned functions
(PetscLogSetThreshold(), PetscLogEventSetDof(),
PetscLogEventSetError(), PetscASend(), PetscARecv(), PetscAReduce())

- PetscFEOpenCLLogResidual() did some intrusive things related
to the old logging infrastruture: the private header
for the default log handler is now imported into feopencl.c
so that it can do equivalent things with the new infrastructure.

- PetscLogPauseCurrentEvent_Internal() is replaced with
PetscLogEventsPause()

Deprecated symbols include:

- All functions related to PetscStageLog and the resizable array structs
that it contained.

- The legacy EventBegin()/EventEnd() callbacks.

- PetscLogAllBegin(), which actually reported less information than
PetscLogDefaultBegin() because it was not kept up-to-date with
regards to GPU profiling.

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