Federated validation should accept initial membership and be already bootstrapped when spawned

[adlrocha]

Currently in federated validation, we still need to bootstrap the subnet, this means that a minimum number of validators would have to put some collateral in the subnet to bootstrap the subnet in order for the federated validation to kick in, and the owner to be able to start setting the federated power of validators.

I think this is not the way we want it to work. If we choose a Federated subnet, the operator should be able to pass an initial membership and spawn the subnet already bootstrapped without having to send any collateral.

Also, we should introduce a new type of permissioning called Static which would be equivalent to what we currently have in Mycelium, where we allow any validator to join through collateral until the subnet is bootstrapped, point from which no new validators will be accepted.

//cc @maciejwitowski @raulk @cryptoAtwill

[linear]

IPC-6 Federated validation should accept initial membership and be already bootstrapped when spawned

[adlrocha]

Fixed in consensus-shipyard/ipc-solidity-actors#386, consensus-shipyard/ipc-solidity-actors#387, consensus-shipyard/ipc-solidity-actors#389.