This proposal aims to decentralize the following system chains – Kusama Asset Hub (former Statemine) and Kusama Bridge Hub. This change was collectively discussed and agreed by many of the ecosystem collators and it is consistent with [Framework for Collators on System Parachains](https://docs.google.com/document/d/1H2T1Nx90HkSAYF_CaOPLG-o3LS7h_QAa2WLDdcSJMs0/edit#) that was written as a collective effort.

The proposed change will do the following

- leave 2 Parity invulnerable collators on each chain
- make 8 community collators on Asset Hub invulnerable
- create an additional 6 permissionless slots on Asset Hub
- do the same for the BridgeHub

These new 6 permissionless slots will be opened to any new collator by placing a bond of 50 KSM once this referendum is enacted. 

Send a batch of dispatch calls.
Unlike `batch`, it allows errors and won't interrupt.

May be called from any origin except `None`.

- `calls`: The calls to be dispatched from the same origin. The number of call must not
  exceed the constant: `batched_calls_limit` (available in constant metadata).

If origin is root then the calls are dispatch without checking origin filter. (This
includes bypassing `frame_system::Config::BaseCallFilter`).

## Complexity
- O(C) where C is the number of calls to be batched.

- This proposal wants to change the Kusama Asset Hub and Kusama Bridge Hub.
- It will leave 2 Parity invulnerable collators on each chain.
- It will make 8 community collators on Asset Hub invulnerable.
- It will create 6 new permissionless slots on Asset Hub and Bridge Hub.
- New collators can join by placing a bond of 50 KSM.

#214 Further decentralize collator set on Kusama system chains

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