chore(bpf): improve detection of backported tcx/ringbuf support in older kernels

[mozillazg]

closes #236

[mozillazg]

@NeonSludge please try again with the dev version (you can download the binary from the Artifacts section):

https://github.com/mozillazg/ptcpdump/actions/runs/13222698263?pr=244

[NeonSludge]

Can confirm that TCX attach mode now works on an AlmaLinux 9.4 machine with a vanilla kernel:

# uname -r
5.14.0-427.42.1.el9_4.x86_64

...
2025-02-09T21:21:09.41512622+03:00 INFO cmd/capture.go:89] start to attach capture hooks when startup
2025-02-09T21:21:09.415136577+03:00 INFO capturer/capturer.go:224] backend: tc
2025-02-09T21:21:09.415157745+03:00 INFO capturer/capturer.go:356] start to attach tc hook to eth0 in netns {NetNs inode: 4026531840, path: /proc/self/ns/net}
2025-02-09T21:21:09.415249194+03:00 INFO bpf/bpf.go:329] attach tcx/egress hooks to ifindex 2
2025-02-09T21:21:09.427773628+03:00 INFO bpf/bpf.go:344] attach tcx/ingress hooks to ifindex 2
...

Thank you for the quick fix.