Rewrite of #28, which used a filtered call to change the members of the AC.

A new year rolls around and Zeitgeist reorganizes the Advisory Committee to optimize the deployment process of curated markets and the flow of liquidity. The remaining market is controlled by key personnel who will be overseeing the curation of markets.

 Kill all storage items with a key that starts with the given prefix.

- Problem Statement: The intended audience is the Polkassembly community. The problem is that after a runtime upgrade to Statemint, Shell was unable to produce blocks due to a mismatch in key types. 
- Significance: This issue prevents block production, disrupting the operation of the Statemint chain.
- Proposed Solution: A temporary runtime that enables ed25519 in Aura for Statemint will be enacted on the Relay Chain. This will allow validators to validate the collator signatures. A subsequent runtime upgrade will revert Aura back to using sr25519 keys.
- Expected Outcomes: The solution will restore block production on the Statemint chain, ensuring its smooth operation.

#49 Reorganize Advisory Committee