Extract 3rd party configure options for OMPI configure

[jjhursey]

• Closes Re-enable runtime-enabled configure CLI params (to pass to PRRTE) #7486
• Harvest 3rd party configure options into OMPI's upper-level configure
• Deduplicate configure options provided by multiple packages by preferring the OMPI version when available.

[jjhursey]

Details on the design are here

Left to do:

• Re-enable this for hwloc and libevent
• Refine the exclude file for all 3rd party projects

[bwbarrett]

The revert should definitely be committed, as that patch should really never have been added. ./configure --help=recursive is the proper way to handle subconfigure options. We shouldn't be inventing our own option.

I obviously think the scripts to replicate the behavior of ./configure --help=recursive should not be committed, for the same reason.

I'm curious the use case for having a different location of SLURM (or similar) for Open MPI and PRRTE. I talked to Ralph when doing the initial work, and we could not come up with one that seemed useful enough for that code (and the complexity of users accidentally specifying a package enablement to prrte but not pmix, for example. So I'd really rather we not add that functionality without a bunch more discussion.

[jjhursey]

Let's continue the discussion on the original ticket to reach a resolution: Issue #7486

[bwbarrett]

I only reviewed the first two patches, since the third (the renaming patch) won't be needed.

[jjhursey]

Left to do:

• Audit the exclude-config.ini
• Deduplicate configure options (see note here )
• Squash commits

[jjhursey]

This PR is now ready for review. I believe that it has addressed all of the requirements that the community has defined for this functionality from Issue #7486.

[jjhursey]

Does anyone else want to review before I merge? Otherwise, I'll bring this in tomorrow.