Fix the example of XDP and uprobe, adding XDP support for the rust runtime

[Officeyutong]

Closes #121

This PR adds xdp support for the rust runtime. Passing the interface name through attach_target, then the the program will be handled by program.attach_xdp

It also fixed a bug caused by eunomia-bpf/wasm-bpf-guest-sdk-c#1 . The test script of XDP example is wrong. It doesn't pass the ifname as argument, thus the wasm_attach_bpf_program will receive an invalid pointer of attach_target, which makes the attaching failed. uprobe has similar problems, and has been fixed now

[codecov]

Codecov Report

Merging #126 (2f23c9f) into main (00a55d9) will decrease coverage by 0.97%.
The diff coverage is 14.63%.

❗ Current head 2f23c9f differs from pull request most recent head 4f5e154. Consider uploading reports for the commit 4f5e154 to get more accurate results

@@            Coverage Diff             @@
##             main     #126      +/-   ##
==========================================
- Coverage   79.61%   78.65%   -0.97%     
==========================================
  Files          14       14              
  Lines        1310     1335      +25     
==========================================
+ Hits         1043     1050       +7     
- Misses        267      285      +18     

Impacted Files	Coverage Δ
runtime/wasm-bpf-rs/src/bpf/attach.rs	40.27% <14.63%> (-12.92%)	⬇️

... and 1 file with indirect coverage changes