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

Fix some malformed if !defined() header guards

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

Deglobalize logging into PetscLogHandler and PetscLogState

See merge request petsc/petsc!6709

Profiling: Add composed functions for default log handler functions

This makes them extensible to other implementations.
Where appropriate, the global log handler will now dispatch
these functions t

Profiling: Add composed functions for default log handler functions

This makes them extensible to other implementations.
Where appropriate, the global log handler will now dispatch
these functions to all running log handlers.

It is not always appropriate to dispatch to all running log handlers:
when a single return value is expected or when a filename
is given, it will continue to dispatch only to the default
log handler.

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Profiling: Implement the default PetscLogHandler

The existing default log handling that uses the PetscStageLog
is translated in the PetscLogHandler_Default implementation
of PetscLogHandler.

- Most

Profiling: Implement the default PetscLogHandler

The existing default log handling that uses the PetscStageLog
is translated in the PetscLogHandler_Default implementation
of PetscLogHandler.

- Most data that is global in the existing log handling
is moved into the struct, with the exception of the
raw counters.

- The registry data structures of PetscStageLog (eventLog,
classLog) are not reproduced because they are now in
the PetscLogState interface.

- PETSC_LOG_RESIZABLE_ARRAY is used to implement
resizable arrays instead of PetscStageInfo,
PetscEventPerfLog, and PetscClassPerfLog

- The tau perfstubs and MPE functionality is not
reproduced because they will become new
handlers on their own.

- The PetscLogGlobalNames provided by the
PetscLogRegistry interface make the logging
robust to differences in which events / stages are
registered on which process and in which order.

Otherwise the functions are relatively faithful translations
of the existing PetscStageLog functions into the new interface.
When reviewing this commit it might help to have a diff
between the PetscStageLog and PetscLogHandler_Default functions
to see what changes between them. I am working on a way to attach
that to the MR associated with this change.

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