mpibenchmark: new package (#47835)

* mpibenchmark: new package

* mpibenchmark: add copyright header

* mpibenchmark: move the package to the right location

* mpibenchmark: explicitely disable CUDA & ROCm

* mpibenchmark: update copyright

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

* mpibenchmark: streamline management of --enable/--disable

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

* mpibenchmark: streamline autogen

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

* mpibenchmark: fix coding style

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Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>