Add links to Perfetto to visualize self-profile query traces

[Kobzol]

Replace the recently removed Speedscope link with a link to perfetto.dev, for visualizing the self-profile query traces. It also adds a quick link to these trace visualizations to the compile benchmark detail section in the compage page.

[lqd]

Do I have to test this locally with a real profile run? Otherwise perfetto or the FF profiler won't be able to get to the data, it's using localhost (with CORS issues) and not the base url IIUC.

I have added such links myself to perf.rlo years ago, and with hindsight I've rarely used them. They're cute and sometimes useful, but they're also wall-time and contain self-profiling data.

I personally don't think they're used enough to show so many links in the benchmark detail panel. At the same time, I have little time to work on perf these days and if the WG thinks it's more valuable than I do, let's do it.

Therefore I'll approve the PR because apart from nits this looks good to me. But I couldn't test it using perf.rlo's endpoints, I trust you that it does.

[lqd]

If the size of the profiler.json file starts causing issues to read from the site and then upload to Perfetto, we could try converting measureme files to Fuchsia’s format. It’s binary and supports string refs/interning, to reduce a lot of the duplication in the Chrome profiler format. Perfetto also supports it if I understand correctly.

https://fuchsia.dev/fuchsia-src/reference/tracing/trace-format

[Kobzol]

I tried to compress the links:

Let's merge it and see what others say.