R1:dc7e40ff3fc7

Fix the DarkConsole inline error log stack trace expansion behavior for Content-Security-Policy

Summary:
See PHI451. Ref T13102. DarkConsole uses an ancient inline "onclick" handler to expand the stack traces for errors.

The new Content-Security-Policy prevents this from functioning.

Replace this with a more modern behavior-driven action instead.

Test Plan:
- Clicked some errors in DarkConsole, saw stack traces appear.
- Grepped for `onclick` and `jsprintf()` to see if I could find any more of…