change how we call MPI, to make it compatible with MPItrampoline #348

Job	Run time
Julia 1.10 - ubuntu-latest - x64 - push	18m 38s
Julia 1.10 - macOS-latest - x64 - push	10m 42s
Julia 1.10 - macos-13 - x64 - push	16m 50s
Julia 1.10 - windows-latest - x64 - push	13m 33s
Julia ~1.11.0-0 - ubuntu-latest - x64 - push	23m 4s
Julia ~1.11.0-0 - macOS-latest - x64 - push	17m 26s
Julia ~1.11.0-0 - macos-13 - x64 - push	26m 1s
Julia ~1.11.0-0 - windows-latest - x64 - push	18m 59s
Julia nightly - ubuntu-latest - x64 - push	8m 15s
Julia nightly - macOS-latest - x64 - push	11m 23s
Julia nightly - macos-13 - x64 - push	12m 32s
Julia nightly - windows-latest - x64 - push	14m 8s
	3h 11m 31s

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