[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 66.57609% with 246 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.26%. Comparing base (dd45238) to head (dbc7fd5).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
meshroom/submitters/localFarmSubmitter.py	63.38%	93 Missing ⚠️
localfarm/localFarmLauncher.py	49.63%	69 Missing ⚠️
localfarm/localFarm.py	68.39%	67 Missing ⚠️
meshroom/core/graph.py	0.00%	7 Missing ⚠️
tests/test_submit.py	94.23%	6 Missing ⚠️
...lugins/meshroom/pluginSubmitter/PluginSubmitter.py	78.94%	4 Missing ⚠️

Additional details and impacted files

@@                     Coverage Diff                      @@
##           dev/delayChunkEvaluation    #2931      +/-   ##
============================================================
+ Coverage                     79.12%   79.26%   +0.14%     
============================================================
  Files                            59       64       +5     
  Lines                          8292     9025     +733     
============================================================
+ Hits                           6561     7154     +593     
- Misses                         1731     1871     +140     

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