Pass Flux a valid --time-limit in the Tuolumne batch templates

[sbryngelson]

Follow-up to #2032.

tuo.mako and tamd.mako passed MFC's HH:MM:SS walltime straight through as # flux: --time-limit=. flux batch rejects that format (invalid Flux standard duration), so ./mfc.sh run -e batch -c tuo and -c tamd failed at submission. Both templates now convert the walltime to seconds; for example, 00:20:00 becomes 1200s.

Note on the Codex review of #2032: queue detection works on Tuolumne. LC's Slurm-compatibility sbatch wrapper (/usr/global/tools/flux_wrappers/bin/sbatch) is on PATH, so SLURMSystem is selected and submits through Flux. The failure was this walltime format.

Testing

On Tuolumne pdebug: ./mfc.sh run benchmarks/5eq_rk3_weno3_hllc/case.py -e batch -c tamd -p pdebug -a brown -w 00:20:00 -N 1 -n 4 --gpu mp. The job was submitted as --time-limit=1200s and syscheck, pre_process, simulation (0.227 ns/gp/eq/rhs) and post_process all ran. The tuo template has the identical change, but I did not test it.

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Acknowledgement

• I confirm this PR meets the above expectations and reflects my own understanding and real-world context.

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Claude Code Review

Head SHA: 4eef203

Files changed:

• 2
• toolchain/templates/tamd.mako
• toolchain/templates/tuo.mako

Findings:
No issues found. Checked toolchain/templates/tamd.mako and tuo.mako (the HH:MM:SS to seconds conversion in the flux time-limit line, with the default "01:00:00" from commands.py). Note: a walltime in "D-HH:MM:SS" form would raise a ValueError in int(), but the existing Slurm-style default doesn't use that form (low confidence it matters).