Update GCC compiler on NRL systems

[climbfuji]

Is your feature request related to a problem?

The NRL systems Atlantis, Narwhal, and Nautilus have relatively old GNU compilers (11.2.0 and 11.2.1), which are known to have problems with Fortran deferred-length character arrays (character(len=:), dimension(:), allocatable). We make progressively more use of these data structures in the NEPTUNE ecosystem.

Describe the solution you'd like

Update the GCC compilers on the NRL systems to version 13 (testing with 14 should happen elsewhere first). Keep the current GCC version 11 compilers as backends for Intel oneAPI for now.

Additional context

Update to:

• Atlantis gcc@13.4.0 - Update Atlantis and Nautilus: add gcc@13.4.0 stack #1707
  • Follow-up change to use OpenMPI compiled with this version of GCC: Update GCC stack on Atlantis: use openmpi@4.1.8 compiled with gcc@13.4.0 #1738
• Narwhal: wait for system administrators to update the software stack to match Blueback, presumably this will include gcc@13.3.0
• Nautilus gcc@13.4.0 - Update Atlantis and Nautilus: add gcc@13.4.0 stack #1707
  • Follow-up change to use OpenMPI compiled with this version of GCC