## Description 

This adds logic for the transition from an active validator to an
inactive staking pool and adds the logic for withdrawing from an
inactive staking pool.

## Test Plan 

Added a unit test making sure withdrawals could be performed from an
inactive staking pool, and that trying to delegate to an inactive
staking pool errors out.

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skip the following section. Otherwise, please indicate what changed, and
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### Type of Change (Check all that apply)

- [X] breaking change for a client SDKs
- [X] breaking change for FNs (FN binary must upgrade)
- [X] breaking change for validators or node operators (must upgrade
binaries)
- [X] breaking change for on-chain data layout
- [X] necessitate either a data wipe or data migration

### Release notes