🌱 Cleanup v1 cluster before creating v3 clusters on upgrade

[Danil-Grigorev]

What this PR does / why we need it:

Perform automatic provisioning cluster removal on upgrade with v3 clusters feature flag enabled. In case of a duplicate cluster entries, a user can re-run the upgrade without settings change.

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
• [ ] adds unit tests
• [x] adds or updates e2e tests