[submitters] Remove submitters from Meshroom

[Alxiice]

Move submitters to https://github.com/meshroomHub/mrSubmitters
This PR works with the current master in the repo above

Steps before deploying :

1. Deploy mrSubmitters (make sure it's available in production etc)
2. Merge this PR
3. Add mrSubmitters as requirement to package.py in meshroom

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.88%. Comparing base (cf6e719) to head (51cfd91).
⚠️ Report is 2 commits behind head on develop.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
meshroom/core/submitter.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2926      +/-   ##
===========================================
- Coverage    80.88%   80.88%   -0.01%     
===========================================
  Files           59       59              
  Lines         7853     7857       +4     
===========================================
+ Hits          6352     6355       +3     
- Misses        1501     1502       +1     

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