- Clean up entry selection code
- Add source positions for code and deopt events
- Fix log entry selection from script
- Improve log parsing speed

Bug: v8:10644
Change-Id: Ie466679132b8ce24506ecf75223118b32275f931
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2569756
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71624}