Auto merge of #124694 - compiler-errors:rollup-pfou5uu, r=compiler-errors

Rollup of 8 pull requests

Successful merges:

 - #124418 (Use a proof tree visitor to refine the `Obligation` for error reporting in new solver)
 - #124480 (Change `SIGPIPE` ui from `#[unix_sigpipe = "..."]` to `-Zon-broken-pipe=...`)
 - #124648 (Trim crate graph)
 - #124656 (release notes 1.78: add link to interior-mut breaking change)
 - #124658 (Migrate `run-make/doctests-keep-binaries` to new rmake.rs format)
 - #124678 (Stabilize `split_at_checked`)
 - #124681 (zkvm: fix run_tests)
 - #124687 (Make `Bounds.clauses` private)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Diff for: crates/hir-def/src/attr/builtin.rs

@@ -207,7 +207,6 @@ pub const INERT_ATTRIBUTES: &[BuiltinAttribute] = &[
     ),
 
     // Entry point:
-    gated!(unix_sigpipe, Normal, template!(Word, NameValueStr: "inherit|sig_ign|sig_dfl"), ErrorFollowing, experimental!(unix_sigpipe)),
     ungated!(start, Normal, template!(Word), WarnFollowing),
     ungated!(no_start, CrateLevel, template!(Word), WarnFollowing),
     ungated!(no_main, CrateLevel, template!(Word), WarnFollowing),