## Summary
We are releasing Twenty v2.2.0. This PR sets up the
upgrade-version-command machinery for the new release line:
- Promote `2.1.0` into `TWENTY_PREVIOUS_VERSIONS` (it just shipped)
- Set `TWENTY_CURRENT_VERSION` to `2.2.0`
- Reset `TWENTY_NEXT_VERSIONS` to `[]`
- Refresh the `InstanceCommandGenerationService` snapshots to reflect
the new current version (`2.2.0` / `2-2-` slug)
- Update the failing-sequence-runner snapshot to include `2.2.0` in the
covered versions list
The `2-2/` upgrade-version-command module is already in place and wired
into `WorkspaceCommandProviderModule`, so future upgrade commands
targeting `2.2.0` can land directly under `2-2/` (or be generated
against `--version 2.2.0`).
