Fixed a small bug in the reading of workflows

[DanteNiewenhuis]

Summary

Fixed a small bug in the reading of workflows files that removed the children of some tasks.
This could result in an infinite loop.

Added a new test the experimentCLI that tests if a workflow can be run using the experimentCLI

Implementation Notes ⚒️

N / A

External Dependencies 🍀

N / A

Breaking API Changes ⚠️

N / A

Simply specify none (N/A) if not applicable.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 57.55%. Comparing base (90d4369) to head (761233d).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...g/opendc/compute/workload/ComputeWorkloadLoader.kt	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #382      +/-   ##
============================================
+ Coverage     57.44%   57.55%   +0.10%     
  Complexity        1        1              
============================================
  Files           335      335              
  Lines         10826    10827       +1     
  Branches       1038     1039       +1     
============================================
+ Hits           6219     6231      +12     
+ Misses         4240     4229      -11     
  Partials        367      367              

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