fix: Migrate all collateral of pallet-loans to unfrozen

[mustermeiszer]

Description

Many collaterals - pallet-uniques items - where mistakenly created with frozen: true making it impossible to change the metadata without a governance proposal.

We need to write a migration that iterates of the storage Created and Active in the pallet-loans, retrieve the associated collateral and query the items in the pallet-uniques. If the item has frozen: true, we need to change this one to frozen: false.

Research/based on

• Issuers frequently want to change the naming or description of assets

How will this affect the code base

Not at all

What are foreseen obstacles or hurdles to overcome?

Nothing, weight limit is not expected as we have below 100 assets.

[mustermeiszer]

For reference: New naming of DYF asset
IPFS hash: QmPwgk3sqhgoNT9LpquPFVj3HpZSqTk3crEZioAtTXVjME