[MacPorts] #62807: openmpi/mpich: refactor duplicated logic, and simplify ports, via new portgroup

[MacPorts]

#62807: openmpi/mpich: refactor duplicated logic, and simplify ports, via new
portgroup
-------------------------+---------------------------
 Reporter:  mascguy      |      Owner:  mascguy
     Type:  enhancement  |     Status:  assigned
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  openmpi mpich
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 I envision this being a very iterative process, with the initial portgroup
 being something as simple as a few procs to eliminate copy-paste logic.

 Perhaps the portgroup might be named `mpiutil`?

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Ticket URL: <https://trac.macports.org/ticket/62807>
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