mpi-sync-clocks: new package (#47834)

* mpi_ysnc_clocks: new package

* mpi_sync_clocks: move package to the right location

* mpi_sync_clocks: add copyright header

* mpi-sync-clocks: rename package mpi_sync_clocks -> mpi-sync-clocks to comply with naming convention

* mpi-sync-clocks: update copyright

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

* mpi-sync-clocks: streamline autogen

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