To add MSA and specially PMIx support for ParaStationMPI

[damianam]

trafficstars

[SebastianAchilles]

Test report by @sebastianachilles

Overview of tested easyconfigs (in order)

• SUCCESS psmpi-5.9.2-1-GCC-12.3.0.eb

Build succeeded for 1 out of 1 (1 easyconfigs in total) bwd-rockylinux-94 - Linux Rocky Linux 9.4 (Blue Onyx), x86_64, Intel(R) Core(TM) i7-6900K CPU @ 3.20GHz (broadwell), 2 x NVIDIA NVIDIA GeForce GTX 1060 6GB, 535.183.01, Python 3.9.18 See https://gist.github.com/SebastianAchilles/6be949b543dee1844cdbe31f81249157 for a full test report.

[SebastianAchilles]

Going in, thanks @damianam!