Add option for "primordial stakes"

[CriesofCarrots]

Problem

In the /net scripts, non-bootstrap validators are staked by writing the stake accounts into genesis (these were called "primordial stakes" over there). Validator Lab, on the other hand, uses the solana-cli to stake the other validators after the cluster boots. This is inconvenient because it means that it may take several epochs for all the stake to warm up, ie. if the validators are staked somewhat evenly to the bootstrap (which is desirable if you want those other nodes to have a strong presence in the leader schedule).

Proposed Solution

Change behavior of --internal-node-stake-sol or add new option to allow writing non-bootstrap validator stake into genesis. This probably requires writing the vote accounts as well.

[gregcusack]

I'll look into this and see if I can get this built this in the next day or two. not sure why I didn't build this from the start.