Tracking issue for IP packet tracing feature implementation.

Feature: https://github.com/cilium/design-cfps/blob/main/cilium/CFP-33716-packet-tracing.md

During review of implementation, found refactoring is required for notification structs:

93820ad

This is easier to implement and write tests for in a separate PR.

### Tasks
- [ ] https://github.com/cilium/cilium/pull/35059
- [ ] https://github.com/cilium/cilium/pull/35413
- [ ] https://github.com/cilium/cilium/pull/33957
- [ ] https://github.com/cilium/cilium/pull/36825