Remove the use of MPI C++ bindings

[fwyzard]

PR description:

C++ bindings were deprecated in MPI 2.2 and removed in MPI 3.
Open MPI still supports them up to Open MPI 4.1, but has removed them in Open MPI 5.0.

PR validation:

None.

If this PR is a backport please specify the original PR and why you need to backport that PR. If this PR will be backported please specify to which release cycle the backport is meant for:

May be backported if Open MPI 5.x is needed in CMSSW 15.0.x for any reason.

[fwyzard]

enable gpu

[fwyzard]

please test

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-47994/44660

• There are other open Pull requests which might conflict with changes you have proposed:
  • File HeterogeneousCore/MPICore/test/testMPI.cc modified in PR(s): Update MPI Test software #42594

[cmsbuild]

A new Pull Request was created by @fwyzard for master.

It involves the following packages:

• GeneratorInterface/SherpaInterface (generators)
• HeterogeneousCore/CUDACore (heterogeneous)
• HeterogeneousCore/MPICore (heterogeneous)

@bbilin, @fwyzard, @lviliani, @makortel, @menglu21, @mkirsano can you please review it and eventually sign? Thanks.
@alberto-sanchez, @makortel, @missirol, @mkirsano, @rovere, @thuer this is something you requested to watch as well.
@antoniovilela, @mandrenguyen, @rappoccio, @sextonkennedy you are the release manager for this.

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[makortel]

Just to note that there is discussion in #45165 to remove the MPI use from Sherpa. (that shouldn't hold this PR though)