Teach rustc to write the ICE backtrace and query stack to disk

[estebank]

• On non--dev builds, always hide the backtrace and query stack.
• Introduce RUSTC_BACKTRACE_FORCE where 1 will always print the backtrace and 0 will always hide it.

[rustbot]

r? @davidtwco

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[estebank]

For context, this is what the contents of the file looks like

rustc 1.68.0-dev running on x86_64-unknown-linux-gnu at 2023-01-10 02:37:25
compiler flags:
    -Z
    treat-err-as-bug

panicked at compiler/rustc_errors/src/lib.rs:1663:30:
aborting due to `-Z treat-err-as-bug=1`

   0: rustc_driver::write_ice_to_disk
             at ./compiler/rustc_driver/src/lib.rs:1206:19
   1: rustc_driver::DEFAULT_HOOK::{closure#0}::{closure#0}
             at ./compiler/rustc_driver/src/lib.rs:1304:44
   2: <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call
             at ./library/alloc/src/boxed.rs:2002:9
   3: std::panicking::rust_panic_with_hook
             at ./library/std/src/panicking.rs:692:13
8<8<8<8<8<8<8<8<8<8<8<8<8<8<8<8<
 113: std::sys::unix::thread::Thread::new::thread_start
             at ./library/std/src/sys/unix/thread.rs:108:17
 114: start_thread
             at ./nptl/./nptl/pthread_create.c:442:8
 115: clone3
             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81


query stack during panic:
#0 [mir_borrowck] borrow-checking `<impl at f6.rs:45:1: 45:16>::foo`
#1 [analysis] running analysis passes on this crate
end of query stack

And a screenshot of a prior version of the wording, just give an idea of the visual output:

[davidtwco]

r=me if you're looking to land this

[estebank]

@davidtwco would you mind seconding rust-lang/compiler-team#578 in that case?

[bors]

☔ The latest upstream changes (presumably #106730) made this pull request unmergeable. Please resolve the merge conflicts.

[bors]

☔ The latest upstream changes (presumably #106822) made this pull request unmergeable. Please resolve the merge conflicts.