Support migrating directly to Omni Core Staking

[Zodomo]

Problem to Solve

Right now the GenesisStaker migration only opens an order to send them their tokens on Omni Core. We want to be able to migrate the user's staked position in its entirety, so there needs to be a way to trigger a SolverNet order to deposit the user's stake into Staking on Omni Core, rather than just sending them their balance.

Proposed Solution

Implement a flow that allows the MerkleDistributor contract to create a SolverNet order for Omni Core Staking.