CO-RE support for Bombini's eBPF programs

[anfedotoff]

All Bombini's eBPF programs are written in pure Rust and don't support CO-RE. This is a blocker for binary release. I see two ways for solving this:

• help/wait CO-RE support in Aya Add BTF relocation support in eBPF programs aya-rs/aya#349
• implement CO-RE support on Bombini side (thin C wrapper)