chore/docs: support to unroll route loop and update troubleshooting.md

[mzz2017]

Background

dae will fail to load eBPF objects under the compilation of clang-13.

FATA[0022] load eBPF objects: field TproxyWanEgress: program tproxy_wan_egress: load program: argument list too long: 1617: (bf) r2 = r6: 1618: (85) call bpf_map_loo (truncated, 992 line(s) omitted)

Checklist

• The Pull Request has been fully tested
• There's an entry in the CHANGELOG
• There is a user-facing docs PR against https://github.com/daeuniverse/dae

Full changelogs

• Allow defining __UNROLL_ROUTE_LOOP to unroll the route loop for fewer program instructions and shorter loading time. However, enabling this brings more memory occupation.
• Add a related note into troubleshooting.md.
• Add a No network after dae suspend note into troubleshooting.md.

[dae-prow]

❌ Your branch is currently out-of-sync to main. No worry, I will fix it for you.

[mzz2017]

There is no problem with clang-11 or clang-15.

[1715173329]

Aha nice thanks!