Calamari: Migrate all pallets from PalletVersion to StorageVersion

[Garandor]

Parity introduced a new versioning mechanism for its pallets, whereas it now has a (purely numeric) StorageVersion.
paritytech/substrate#9165

The pallets must be migrated to use the new mechanism and parity has created a helper function to do so:
https://paritytech.github.io/substrate/master/frame_support/migrations/fn.migrate_from_pallet_version_to_storage_version.html

ATTN: Instead of migrating the old PalletVersion number, parity's migration helper hard sets the storage version to whatever is set to be the StorageVersion in current code ( instead of what is on the chain )
-> let version = <T as GetStorageVersion>::current_storage_version();
Care must be taken to ensure that all migrations were applied to the pallets before this migration is executed

This must be applied during one of the next runtime upgrades and we should adapt our own pallets to use the same mechansim as well

[flame4]

Here append a official storage migration tracking doc by alex: https://github.com/apopiak/substrate-migrations