To be able to recover the parachain in case of failure during the migration to Polkadot, the manager account has to be unlocked.

Schedule the currently externally-proposed majority-carries referendum to be tabled
immediately. If there is no externally-proposed referendum currently, or if there is one
but it is not a majority-carries referendum then it fails.

The dispatch of this call must be `FastTrackOrigin`.

- `proposal_hash`: The hash of the current external proposal.
- `voting_period`: The period that is allowed for voting on this proposal.
	Must be always greater than zero.
	For `FastTrackOrigin` must be equal or greater than `FastTrackVotingPeriod`.
- `delay`: The number of block after voting has ended in approval and this should be
  enacted. This doesn't have a minimum amount.

Emits `Started`.

Weight: `O(1)`

- **Problem Statement:** Recovery of parachain in case of migration failure requires unlocking the manager account.
- **Significance:** Ensures successful recovery and continuity of operations during migration.
- **Proposed Solution:** Unlocking the manager account for parachain recovery.
- **Expected Outcomes:** Seamless recovery process and uninterrupted migration to Polkadot.

#6 Unlock parachain manager account