replace process exit with more detailed exit in src/bootstrap/*.rs
Fixes [#98830](https://github.com/rust-lang/rust/issues/98830)
I implemeted "detail_exit.rs" in lib.rs, and replace all of std::process::exit.
So, error code should panic in test code.
```
// lib.rs
pub fn detail_exit(code: i32) -> ! {
// Successful exit
if code == 0 {
std::process::exit(0);
}
if cfg!(test) {
panic!("status code: {}", code);
} else {
std::panic::resume_unwind(Box::new(code));
}
}
```
<details>
<summary>% rg "exit\(" src/bootstrap/*.rs</summary>
```
builder.rs
351: crate::detail_exit(1);
1000: crate::detail_exit(1);
1429: crate::detail_exit(1);
compile.rs
1331: crate::detail_exit(1);
config.rs
818: crate::detail_exit(2);
1488: crate::detail_exit(1);
flags.rs
263: crate::detail_exit(exit_code);
349: crate::detail_exit(exit_code);
381: crate::detail_exit(1);
602: crate::detail_exit(1);
616: crate::detail_exit(1);
807: crate::detail_exit(1);
format.rs
35: crate::detail_exit(1);
117: crate::detail_exit(1);
lib.rs
714: detail_exit(1);
1620: detail_exit(1);
1651:pub fn detail_exit(code: i32) -> ! {
1654: std::process::exit(0);
sanity.rs
107: crate::detail_exit(1);
setup.rs
97: crate::detail_exit(1);
290: crate::detail_exit(1);
test.rs
676: crate::detail_exit(1);
1024: crate::detail_exit(1);
1254: crate::detail_exit(1);
tool.rs
207: crate::detail_exit(1);
toolstate.rs
96: crate::detail_exit(3);
111: crate::detail_exit(1);
182: crate::detail_exit(1);
228: crate::detail_exit(1);
util.rs
339: crate::detail_exit(1);
378: crate::detail_exit(1);
468: crate::detail_exit(1);
```
</details>