🌱 Support for management v3 downgrade to provisioning v1 with automigration

[Danil-Grigorev]

What this PR does / why we need it:

Add downgrade procedure as described in the ADR #579

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #

Special notes for your reviewer:

Checklist:

• [ ] squashed commits into logical changes
• [ ] includes documentation
• [x] adds unit tests
• [x] adds or updates e2e tests