Auto merge of #69729 - RalfJung:backtrace, r=Mark-Simulacrum
Auto merge of #69729 - RalfJung:backtrace, r=Mark-Simulacrum

update backtrace crate

In particular this release includes https://github.com/rust-lang/backtrace-rs/pull/297 and https://github.com/rust-lang/backtrace-rs/pull/300.

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust