[core] Add local farm + tests for submitter

[Alxiice]

• Add local farm here : root/localfarm
  • This is a local render farm. It can be used either to launch parallelized nodes locally or to provide a template for submitters. It will also be used to test the submission process
• Add tests for the submitter

[codecov]

Codecov Report

❌ Patch coverage is 85.82090% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.09%. Comparing base (88ef217) to head (4aef4ab).
⚠️ Report is 9 commits behind head on develop.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
meshroom/core/graph.py	0.00%	7 Missing ⚠️
tests/test_submit.py	94.33%	6 Missing ⚠️
...lugins/meshroom/pluginSubmitter/PluginSubmitter.py	78.94%	4 Missing ⚠️
meshroom/core/__init__.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2931      +/-   ##
===========================================
+ Coverage    79.74%   81.09%   +1.34%     
===========================================
  Files           64       66       +2     
  Lines         8732     8858     +126     
===========================================
+ Hits          6963     7183     +220     
+ Misses        1769     1675      -94     

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