Symbol of items instantiated w/ dyn trait w/ assoc const bindings not demangled (aka `backtrace`'s `rustc-demangle` needs to be bumped)

[fmease]

Reproducer

#![feature(min_generic_const_args)]

trait Trait { #[type_const] const N: usize; }

fn f<T: ?Sized>() { panic!(); }

fn main() { f::<dyn Trait<N = 1>>(); }

Program Output

thread 'main' (13) panicked at src/main.rs:5:21:
explicit panic
stack backtrace:
   0: __rustc::rust_begin_unwind
             at /rustc/39052daf937d46373ac29778e1b8853c52c0cc25/library/std/src/panicking.rs:689:5
   1: core::panicking::panic_fmt
             at /rustc/39052daf937d46373ac29778e1b8853c52c0cc25/library/core/src/panicking.rs:80:14
   2: core::panicking::panic
             at /rustc/39052daf937d46373ac29778e1b8853c52c0cc25/library/core/src/panicking.rs:150:5
   3: _RINvCshWKxMDStewK_10playground1fDNtB2_5Traitp1NKj1_EL_EB2_
             at ./src/main.rs:5:21
   4: playground::main
             at ./src/main.rs:7:13
   5: <fn() as core::ops::function::FnOnce<()>>::call_once
             at ./.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Background

In PR #150843 I intentionally only bumped rustc-demangle for compiler, not for any other project (library, tools).

Steps

• Merge Bump rustc-demangle backtrace-rs#746
• Optionally(?) release a new version of backtrace
• Update submodule backtrace, library/std/Cargo.toml and lock file