Improved DatasetNotFound error

[klakhov]

Summary

The goal of this PR is to improve infromation reported by DatasetNotFound error. Now it tries to show what file we are looking for

How to test

Checklist

• I submit my changes into the develop branch
• I have added description of my changes into CHANGELOG
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues

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) 2022 CVAT.ai Corporation
#
# SPDX-License-Identifier: MIT

[klakhov]

Not relevant anymore, all improvements to this error were fixed in cvat#7923