Optimize config.lookup_package check in trace_end

[symwell]

Doing config.lookup_package check first returns early in 98.7% of cases in sample_app_6th_ed.

APPMAP=true DISABLE_SPRING=true GEM_HOME=gems bundle exec rails test > lambda_hook.txt

$ cat lambda_hook.txt | grep 'trace_end_hook_body_3' | wc -l
5863

$ cat lambda_hook.txt | grep 'trace_end_hook_body_3.5' | wc -l
74

It decreased instance_methods.each(&hook.(cls)) execution from 0.169 to 0.079.

Total execution time of trace_end decreased from 0.279 to 0.104

Addresses https://github.com/applandinc/board/issues/129

[appland-release]

🎉 This PR is included in version 0.87.0 🎉

The release is available on:

• v0.87.0
• GitHub release

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