Make slurm workflow manager call execute_experiment

[rfbgo]

Placeholder for discussion of changing slurm workflow manager to use execute_experiment

[gemini-code-assist]

Code Review

This pull request updates the Slurm workflow manager template to source an execute_experiment script instead of running a generic command, and updates the corresponding tests to verify the generation and contents of this script. The review feedback suggests quoting the {execute_experiment} path in the template to prevent word splitting, and explicitly specifying encoding="utf-8" when opening files in the test suite to ensure cross-platform consistency.

[ramble-pr-bot]

Ramble Performance Test Metrics

Results produced with commit: 5605f32

Test Name	Outcome	Duration (s)	Last 5 Avg (s)
test_analyze_large_file	passed	3.0322	2.9806
test_large_template_expansion	passed	2.2269	2.1303
test_many_experiments	passed	78.4217	77.7977
test_many_objects_defaults	passed	32.0101	34.9550
test_matrix_filter_perf	passed	1.6304	1.6242

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.90%. Comparing base (20f49f7) to head (5605f32).
⚠️ Report is 5 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1589   +/-   ##
========================================
  Coverage    92.90%   92.90%           
========================================
  Files          340      340           
  Lines        32580    32584    +4     
========================================
+ Hits         30269    30273    +4     
  Misses        2311     2311           

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[linsword13]

This is a great idea!

One thing I wonder, is if (say Slurm) user has expectations that custom sbatch headers they added into execute_experiment template should work, and maybe surprised that they don't?

[rfbgo]

Yea great call out, this is definitely a very real and valid concern. Do you think it is sufficient to detect it and warn the user? or is it so concerning that we should not pursue this approach?

I guess it's also a risk they do this now into execute_experiment and not realize it is potentially unused

[linsword13]

I think this is the right approach, but a warning might be useful.

We also have an existing warning (via the workflow_banner), that's likely made obsolete with the current change.