Refactor permissions.py from IAM app

[nmanovic]

Motivation and context

When you migrate from the older version of CVAT (e.g. 1.7.0) you already have a lot of tasks and projects. Usually users want to move them under corresponding organization. Now it is impossible. The PR should solve the problem and provide corresponding REST API.

How has this been tested?

Manually

Checklist

• I submit my changes into the develop branch

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 Intel Corporation
#
# SPDX-License-Identifier: MIT