Fix benchmarks

[sandro-elsweijer]

Describe your changes here:
Removed one deprecated benchmark and renamed the rest to fit into the coding guidelines

All these boxes must be checked by the reviewers before merging the pull request:

As a reviewer please read through all the code lines and make sure that the code is fully understood, bug free, well-documented and well-structured.

General

• The reviewer executed the new code features at least once and checked the results manually

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• New source/header files are properly added to the Makefiles

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Tests

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Github action

• The code compiles without warning in debugging and release mode, with and without MPI (this should be executed automatically in a github action)

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License

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Tag Label

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