Display actual vars instead of two dots.

The same was done for Args and ArgsOs in 275f9a0.

Fixes rust-lang#113404

…joshtriplett

Partially stabilize `int_roundings`

This stabilizes the following:

```rust
impl uX {
    pub const fn div_ceil(self, rhs: Self) -> Self;
    pub const fn next_multiple_of(self, rhs: Self) -> Self;
    pub const fn checked_next_multiple_of(self, rhs: Self) -> Option<Self>;
}
```

This feature is tracked in rust-lang#88581.

…manieu

Better Debug for Vars and VarsOs

Display actual vars instead of two dots.

The same was done for Args and ArgsOs in 275f9a0.

Mark `___asan_globals_registered` as an exported symbol for LTO

Export a weak symbol defined by AddressSanitizer instrumentation.
Previously, when using LTO, the symbol would get internalized and eliminated.

Fixes rust-lang#113404.

---------------

FWIW, let me list similar PRs from the past + who reviewed them:

* rust-lang#68410 (fixing `__msan_keep_going` and `__msan_track_origins`; reviewed by ``@varkor)``
* rust-lang#60038 and rust-lang#48346 (fixing `__llvm_profile_raw_version` and `__llvm_profile_filename`; reviewed by ``@alexcrichton)``

…vidtwco

Record binder for bare trait object in LifetimeCollectVisitor

The `LifetimeCollectVisitor` had a bug where it was not recording the binder of bate trait objects. This was uncovered in rust-lang#114487, when I changed opaque type lowering to ICE if it encountered a captured fresh lifetime with no def-id to map back to: https://github.com/rust-lang/rust/pull/114487/files#diff-ad0c15bbde97a607d4758ec7eaf88248be5d6b8ae084dfc84127f81e3f7a9bb4R1585

Fixes rust-lang#114664

Cover ParamConst in smir

Others variants won't be useful for a while or ever(?), but we might need this one.

r? ```@oli-obk```

Mark oli as "on vacation"