Set default TUS chunk size from 100 to 2 MB

[azhavoro]

Motivation and context

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into the CHANGELOG file
• 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.

[nmanovic]

@azhavoro , Great patch. Need to add a comment and a line into CHANGELOG.md. Thus in the future, it will prevent us from increasing the value.

[azhavoro]

@azhavoro , Great patch. Need to add a comment and a line into CHANGELOG.md. Thus in the future, it will prevent us from increasing the value.

Done

[azhavoro]

@nmanovic Do you have other comments?