Staked collateral bank params update in sync

[jgur-psyops]

To be started following the merge of #248

All staked collateral banks are AT LEAST equivalent to one SOL in value, and since they are roughly the same, we should be able to update the params for all of the staked collateral banks at the same time rather than updating params like oracle, deposit limit, etc on a per-bank basis.

Add a per-group account that sets the typical bank parameters (oracle, deposit limit, etc) for ALL staked collateral banks that belong to that group. The add_pool_permissionless ix will load these parameters, and we will add a permissionless ix to propagate those settings to any given staked collateral bank, so the multisig can change the settings in just the per-group account instead of on a per-bank basis.