Rollup of 11 pull requests
Successful merges:
- #128316 (Stabilize most of `io_error_more`)
- #129473 (use `download-ci-llvm=true` in the default compiler config)
- #129529 (Add test to build crates used by r-a on stable)
- #129981 (Remove `serialized_bitcode` from `LtoModuleCodegen`.)
- #130094 (Inform the solver if evaluation is concurrent)
- #130132 ([illumos] enable SIGSEGV handler to detect stack overflows)
- #130146 (bootstrap `naked_asm!` for `compiler-builtins`)
- #130149 (Helper function for formatting with `LifetimeSuggestionPosition`)
- #130152 (adapt a test for llvm 20)
- #130162 (bump download-ci-llvm-stamp)
- #130164 (move some const fn out of the const_ptr_as_ref feature)
r? `@ghost`
`@rustbot` modify labels: rollup
26b2b8d162