Blueback gcc@14, new variant fix_rt_linkage for intel-oneapi-compilers + bug fix in spack stack check-preferred-compiler, codee 2026.1.2

[climbfuji]

Description

1. Add gcc@14.3.0 on Blueback.
2. Fix bug in spack stack check-preferred-compiler, see Bug in 'spack stack check-preferred-compiler' for package without explicit config #2000.
3. Add variant +fix_rt_linkage to all NRL tier1 and tier2 external intel-oneapi-compilers specs, as well as to the two Intel GitHub CI tests.
4. Update Codee to 2026.1.2.

Dependencies

• New variant fix_rt_linkage for intel-oneapi-compilers to fix missing symbols in libimf.so/libirc.so (spack-packages #4092) spack-packages#55
• codee: add v2026.1.1& v2026.1.2 (spack-packages #4526) spack-packages#56

Issues addressed

Closes #2000
Closes #1933

Applications affected

No direct effect. The variant +fix_rt_linkage only fixes the faulty Intel runtime libraries during installation

Systems affected

NRL sites.

Testing

• CI: Note whether the automatic tests (GitHub actions tests that run automatically for every commit) pass or not
  • GitHub actions CI tests pass
  • GitHub actions CI tests do not pass (provide explanation)
  • GitHub actions CI tests skipped (provide explanation if necessary)
• New tests added: List and describe any new tests added to GitHub actions
  • ...
• Additional testing: Add information on any additional tests conducted
  • ...

Checklist

• This PR addresses one issue/problem/enhancement or has a very good reason for not doing so.
• These changes have been tested on the affected systems and applications.
• All dependency PRs/issues have been resolved and this PR can be merged.
• All necessary updates to the documentation (spack-stack wiki) will be made when this PR is merged

[climbfuji]

Discovered while rebuilding everything from scratch (i.e. not reusing the build cache - too many concurrent packages with too many make threads exhausted the available resources, even on Blueback).