Build release .wasm with debug symbols

[emilk]

What

This makes the compressed .wasm around 300kB bigger (+5%). In return we get:

• Good callstacks on panics
• In-browser profiling using the normal browser profiling tools

Checklist

• I have read and agree to Contributor Guide and the Code of Conduct
• I've included a screenshot or gif (if applicable)
• I have tested the web demo (if applicable):
  • Using newly built examples: app.rerun.io
  • Using examples from latest main build: app.rerun.io
  • Using full set of examples from nightly build: app.rerun.io
• The PR title and labels are set such as to maximize their usefulness for the next release's CHANGELOG
• If applicable, add a new check to the release checklist!

• PR Build Summary
• Docs preview
• Examples preview
• Recent benchmark results
• Wasm size tracking

[github-actions]

Size changes

Name	main	5708/merge	Change
Wasm	18.67 MiB	20.08 MiB	+7.55%

[emilk]

Here's a screenshot of the chromium profiler on one frame of the OPF example