Migration for pallet_xcm data: Queries, LockedFungibles, and RemoteLockedFungibles

[bkontur]

Description

pallet-xcm stores some operational data that uses Versioned* XCM types. When a new XCM version (XV) is added, XV-2 is deprecated and XV-3 is removed. Without proper migration, this can lead to issues with undecodable storage, as was observed on the XCMv5 branch where XCMv2 was removed. If we inspect Polkadot/Kusama chains, we can still find Versioned*::V2 XCM data, as shown in screenshots at the end.

pallet_xcm includes a MigrateToLatestXcmVersion migration, which has been added to all runtimes. However, we need to bump pallet_xcm to the version that contains the fix from this PR. This update should be deployed to live chains before introducing XCMv5 to the runtimes, as XCMv2 is removed in that version.

Progress

• Bump pallet_xcm version when Fix migrations for pallet-xcm paritytech/polkadot-sdk#6148 released
• Ping/notify parachain teams to check their data and apply this migration.

Data examples