Derive Slurm account args from allocation project

[yoshifuminakamura]

Summary

Derive scheduler account arguments from the Portal allocation project ID only where the system submit syntax is known to require it.

Details

• Keep Portal execution profiles scheduler-agnostic: profiles store the semantic allocation_project_id, not scheduler command-line fragments.
• Translate BK_ALLOCATION_PROJECT_ID to Slurm --account=<id> for RIKYU.
• Leave RC cloud systems without derived --account; they can still use explicit site-local BK_SCHEDULER_EXTRA_ARGS* overrides if needed.
• Allow approved Portal profiles to leave allocation_project_id empty.
• Add shell coverage for derived RIKYU args, RC no-op behavior, and explicit RC override behavior.

Validation

• bash scripts/tests/test_scheduler_extra_args.sh
• shellcheck -S error scripts/job_functions.sh scripts/test_submit.sh scripts/test_submit_build.sh scripts/tests/test_scheduler_extra_args.sh scripts/tests/test_result_profile_data.sh scripts/tests/test_process_and_send_results.sh
• git diff --check
• /home/nakamura/fugakunext/venv/bin/python result_server/tests/run_result_server_tests.py -q
• BK_ALLOCATION_PROJECT_ID=test bash scripts/matrix_generate.sh