Include `CHPL_COMM_OFI_OOB` in printchplenv and unique'd library paths

[jabraham17]

Currently we have CHPL_COMM_OFI_OOB which allows selecting between different out-of-band communication primitives. It has a similar relationship to CHPL_COMM=ofi as CHPL_COMM_SUBSTRATE and CHPL_GASNET_SEGMENT have to CHPL_COMM=gasnet, but is not included in all the same places.

I think this should be included in printchplenv (and by extension chplconfig), as well as apart of unique library paths (as this changes the runtime files that are compiled)

[jhh67]

See https://github.com/Cray/chapel-private/issues/5501 also.