Consensus simple merging

[zhiltsov-max]

Motivation and context

Depends on #8939
A part of #8434

Merging is supported for all annotations except 2d and 3d cuboids. 3d tasks are not supported.

• Added support for consensus task and consensus job merging (API and UI)
• Added simple consensus settings
• Added server tests
• Added new consensus RQ queue and worker

TODO:

• Add a test for simultaneous use of consensus and honeypots
• Add a test for simultaneous use of consensus and gt

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have created a changelog fragment
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see GitHub docs)
• I have increased versions of npm packages if it is necessary
  (cvat-canvas,
  cvat-core,
  cvat-data and
  cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Security Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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