[FEAT] add new bpf_attach event

[roikol]

Prerequisites

• [ ] This issue is an EPIC issue (add label: EPIC).
• [ ] This issue is an EPIC TASK (add issue to EPIC description).

Select one OR another:

• [x] I'll create a PR to implement this feature (assign to yourself).
• [ ] Someone else should implement this (describe it well).

Feature description

This feature is about adding bpf_attach event. This event will indicate bpf program being attached to a system event (kprobe, tracepoint, etc.).

This event will be then used in signatures.