[WIP][UI] Source/target storage

[Marishka17]

Motivation and context

How has this been tested?

Need to update e2e tests:

• [x] actions_projects_models/case_103_project_export.js
• [x] actions_projects_models/case_104_project_export_3d.js
• [x] actions_projects_models/case_114_backup_restore_project.js
• [x] actions_tasks/case_52_dump_upload_annotation.js
• [x] actions_tasks/issue_2473_import_annotations_frames_dots_in_name.js
• [x] actions_tasks2/case_97_export_import_task.js
• [x] actions_tasks3/case_47_export_dataset.js
• [x] issues_prs2/issue_1568_cuboid_dump_annotation.js
• [x] canvas3d_functionality/case_91_canvas3d_functionality_dump_upload_annotation_point_cloud_format.js
• [x] canvas3d_functionality/case_92_canvas3d_functionality_dump_upload_annotation_velodyne_points_format.js
• [x] canvas3d_functionality/case_93_canvas3d_functionality_export_dataset.js

Checklist

• [ ] I submit my changes into the develop branch
• [ ] I have added a 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.