Notify network:fork event

[shuse2]

Description

• Create hook for network fork
• Call webhook with below the schema:

{ event: “monitor:network:fork”, time: 123, payload: { reason: “” } }

Motivation

This event is required in order to notify external services about network forks.

Acceptance Criteria

• Add unit tests to check if the hook is fired in case of these events
• Check if the webhook is called by registering to the framework

Additional Information

Related issues: #5216

[ManuGowda]

This task will be covered as part of issue #5298