Add jailing and tombstoning to the ICS misbehaviour handling

[sainoe]

Summary

This issue describes the remaining work of handling Light Client Attack evidence on the provider module.

Problem Definition

Once #826 is merged, the necessary jailing and slashing actions against the detected byzantine should be added to the handling logic.

Proposal

Update the ICS misbehaviour handling logic to have the tombstoning and slashing action triggered upon valid evidence submitted to the provider.

edit: the slashing action was moved to another issue due to a limitation found in the initial design.

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned
• Is a spike necessary to map out how the issue should be approached?