[EPIC] [Dynamic Protocol State | M2 & M3]: Key-Value Store

[durkmurder]

Context

This epic groups issues related to implementation of key-value store as part of Dynamic Protocol State.

Milestones

• [ ] [M1] Milestone 1: Key-Value Store Implementation Complete
  • KV Store extension to Dynamic Protocol State is implemented.
• [ ] [M2] Milestone 2: Minimal Upgrade Mechanism
  • Demonstrate a protocol state KV Store schema upgrade and coordinated restart via service event.
• [ ] [M3] Milestone 3: Deployment & Future

### Tasks
- [ ] https://github.com/onflow/flow-go/issues/5351
- [ ] https://github.com/onflow/flow-go/issues/5326
- [ ] https://github.com/onflow/flow-go/issues/5315
- [ ] https://github.com/onflow/flow-go/issues/5320
- [ ] https://github.com/onflow/flow-go/issues/5666
- [ ] https://github.com/onflow/flow-go/issues/5324