Local cumulus testing environment with staking-related pallets

[gpestana]

Set up a local testing environment with zombienet to spin up and test the Staking Chain. To begin with, the staking chain runtime may include the non-PoV friendly staking-related pallets.

Staking-related pallets to add in the parachain runtime

• pallet-staking
• pallet-election-provider-multi-phase
• pallet-nomination-pools
• pallet-fast-unstake
• pallet-bags-list

Zombienet chains

• relay chain
• parachain 1: staking chain
• parachain 2: asset hub

[Ank4n]

May be pallet session as well (which we will eventually refactor a lot and it will end up being a session-lite). It might be easier to set the chain up with pallet session to begin with.
Also probably pallet_nis will move to Staking Chain.

[gpestana]

Perhaps we should give the parachain-launch or similar a go on this.

[gpestana]

With this, we should be able to:

• run staking parachain (with old pallets) in a local env
• deploy in rococo with a side-chain that emulates the relay chain and asset hub

Note: aura will never be connected to the staking parachain in Rococo/Westend for now, this is just to simulate and play with the staking parachain and relay chain "mock"