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Auto merge of #117089 - wesleywiser:update_backtrace, r=Mark-Simulacrum
Update backtrace submodule
This pulls in a few notable changes (see the [complete list](https://github.com/rust-lang/backtrace-rs/compare/99faef833f890fe89f1a959d89b951954118828b...e9da96eb452aa65e79e2342be700544afe509440) for details):
- https://github.com/rust-lang/backtrace-rs/pull/508
- https://github.com/rust-lang/backtrace-rs/pull/566
- https://github.com/rust-lang/backtrace-rs/pull/569
- Fixes #116403 by no longer using `dbghelp.dll` during backtrace capture.
