enhance psmpi easyblock to activate CUDA support when it is a dependency + make check for static libs in MPICH easyblock optional

[damianam]

and to make the check for static libs in mpich optional, as they aren't always there

[SebastianAchilles]

Test report by @sebastianachilles

Overview of tested easyconfigs (in order)

• SUCCESS psmpi-5.8.0-1-GCC-11.3.0.eb
• SUCCESS MPICH-3.4.2-GCC-10.3.0.eb

Build succeeded for 2 out of 2 (2 easyconfigs in total) bwd-rockylinux-92 - Linux Rocky Linux 9.2 (Blue Onyx), x86_64, Intel(R) Core(TM) i7-6900K CPU @ 3.20GHz (broadwell), Python 3.9.16 See https://gist.github.com/SebastianAchilles/35c2ec66a9cbab42ea37a7b301aff95d for a full test report.

[damianam]

This kind of stalled, but in principle there is no reason to don't merge I guess. Ping @SebastianAchilles @ocaisa @boegel

[SebastianAchilles]

Going in, thanks @damianam!