perf: cache scafi program lookup via reflection avoiding reflect invocation on each node

[nicolasfara]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 47.82609% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.70%. Comparing base (b2e9ade) to head (588bfdd).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
.../it/unibo/alchemist/actions/RunScafi3Program.scala	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #246      +/-   ##
==========================================
- Coverage   60.37%   59.70%   -0.67%     
==========================================
  Files          58       58              
  Lines         742      757      +15     
  Branches       61       60       -1     
==========================================
+ Hits          448      452       +4     
- Misses        294      305      +11     

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