[CI] Run Intel MPI jobs on ubuntu-latest

[giordano]

ubuntu-18.04 isn't supported anymore in GitHub Actions, we aren't running Intel MPI CI jobs at all at the moment.

Opening as draft to see whether this works, because the comments say "20.04 not supported".

[giordano]

I have no idea why it was written that Ubuntu 20.04 wasn't supported, but Intel MPI tests are passing on ubuntu-latest, apart from the expected segfault from #724 (but not when using MPITrampoline, I presume because it doesn't capture the signals) Edit: nevermind, we weren't actually using Intel MPI with MPITrampoline, fixed in a later commit, see below, and now tests are segfaulting also with MPITrampoline

[giordano]

There's something wrong: https://github.com/JuliaParallel/MPI.jl/actions/runs/5365085806/jobs/9733674071#step:11:223

Test Failed at /home/runner/work/MPI.jl/MPI.jl/test/runtests.jl:31
  Expression: ENV["JULIA_MPI_TEST_BINARY"] == MPIPreferences.binary
   Evaluated: "MPItrampoline_jll" == "MPICH_jll"

Edit: fixed with 054092b

[giordano]

Ah, now I see, installing Intel MPI on Ubuntu 22.04 prints out:

-- Unsupported OS
Detected operating system is not supported. Supported operating systems for this
release are: 
    - Amazon Linux* 2 (Intel(R) 64);
    - CentOS* 7 (Intel(R) 64), 8 (Intel(R) 64);
    - Clear Linux* OS  (Intel(R) 64);
    - Debian* 9 (Intel(R) 64), 10 (Intel(R) 64);
    - Fedora* 30 (Intel(R) 64);
    - Red Hat* Enterprise Linux* 7 (Intel(R) 64), 8 (Intel(R) 64);
    - SUSE Linux Enterprise Server* 12 (Intel(R) 64), 15 (Intel(R) 64);
    - Ubuntu* 16.04 (Intel(R) 64), 18.04 (Intel(R) 64), 19.04 (Intel(R) 64);
--------------------------------------------------------------------------------

But hey, it works and we don't have many other choices.