Refactoring of buffer handling system

[JoMee]

Enhanced Buffer Management with Logging

Summary

This pull request introduces a BufferHandler class along with a LoggingBufferHandler decorator to simplify the buffer management and add logging functionality. As well as added code to the Communicator to gather all logs and store them in a file.

Changes

1. BufferHandler Implementation

• Created a BufferHandler class for buffer management, without the need for the tag attribute.
• Added methods for explicitly managing used and free buffers.
• Doxygen documentation.

2. LoggingBufferHandler Decorator

• Added a LoggingBufferHandler decorator, which wraps BufferHandler and logs buffer operations.
• Doxygen documentation.

3. Integration with Communicator Class

• Integrated the LoggingBufferHandler into the Communicator class.

4. Serialization and Deserialization

• Implemented serialization and deserialization functions for LogEntry data to support easy handling of log data.
• Added functionality to gather logs from all MPI ranks and save them in a structured file format.

6. Unit Tests

• Developed unit tests for BufferHandler and LoggingBufferHandler and serialization, covering core functionalities, logging operations, and serialization/deserialization.
• Unit tests run for buffer management run for all available memory spaces.

Testing

• Ran templated tests against multiple memory spaces.
• Tests have been executed successfully on Gwendolyn on an A100 and on my host system.

[aaadelmann]

in genera i.e. for all test a high level description of what is tested would be nice for ALL tests

[matt-frey]

Looks good in general. Thanks. I have a few comments though.

[matt-frey]

Thanks!