Narwhal: oneapi-2024.2.0 --> oneapi-2026.1.0

[climbfuji]

Description

1. Update of Intel oneAPI compiler on Narwhal from oneapi-2024.2.0 to oneapi-2026.1.0.
2. Wrap module purge in Intel oneAPI installer script in set +e ... set -e because this command exits with an error on Blueback and Narwhal (cannot unalias mpirun) that can be ignored.

Dependencies

None

Issues addressed

Closes #2104

Applications affected

None

Systems affected

Narwhal

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
  • Built unified-env and neptune-env on Narwhal with Intel oneAPI 2026.1.0

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