Add dataset URI to Task from CLI

[dreaquil]

Motivation and context

It would be useful to programmatically attach a git repository for annotation synchronization.

Closes #2976.

How has this been tested?

Tested this in a personal deployment of CVAT over HTTPS.

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read 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.
• I have updated the license header for each file (see an example below)

# Copyright (C) 2021 Intel Corporation
#
# SPDX-License-Identifier: MIT

[coveralls]

Coverage decreased (-0.8%) to 74.924% when pulling 0e3ac43 on dreaquil:2976-dataset-uri-cli into 9e10f5e on openvinotoolkit:develop.

[azhavoro]

@dreaquil Thanks for the contribution, please fix minor comment about checking request status.