Updates the Kusama system to the v1.2.4 release.
https://github.com/polkadot-fellows/runtimes/releases/tag/v1.2.4

Enactment set for [Monday, 3 June](https://kusama.subscan.io/block/23450000).

See [`Pallet::dispatch_whitelisted_call_with_preimage`].

- Problem Statement: Updating the Kusama system to the v1.2.4 release for the Kusama community.
- Significance: Enhancing system functionality, security, and performance.
- Proposed Solution: Enact the update to v1.2.4 by Monday, 3 June.
- Expected Outcomes: Improved system efficiency and security for Kusama users.

#400 Update Kusama System v1.2.4