rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names

Resolves rust-lang#148275 by preventing name collisions in the `#[bench]` macro.

Previously, a user-defined function named "b" could not be benchmarked because
the macro-generated lambda identity collided with the same name. We now generate
the lambda ident as `__bench_<function_name>`, ensuring it is always distinct
from the user’s function.

Because the prefix is applied recursively (e.g. benchmarking `__bench_b`
produces a lambda ident `__bench___bench_b`), there is no possible function
name that can equal its corresponding lambda ident. This guarantees that
the user can safely bench a function of any valid name without risk of
identifier collision.

Rollup of 16 pull requests

Successful merges:

 - #147534 (Implement SIMD funnel shifts in const-eval/Miri)
 - #147686 (update isolate_highest_one for NonZero<T>)
 - #148020 (Show backtrace on allocation failures when possible)
 - #148204 (Modify contributor email entries in .mailmap)
 - #148230 (rustdoc: Properly highlight shebang, frontmatter & weak keywords in source code pages and code blocks)
 - #148279 (rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names)
 - #148555 (Fix rust-by-example spanish translation)
 - #148556 (Fix suggestion for returning async closures)
 - #148585 ([rustdoc] Replace `print` methods with functions to improve code readability)
 - #148600 (re-use `self.get_all_attrs` result for pass indirectly attribute)
 - #148612 (Add note for identifier with attempted hygiene violation)
 - #148613 (Switch hexagon targets to rust-lld)
 - #148619 (Enable std locking functions on AIX)
 - #148644 ([bootstrap] Make `--open` option work with `doc src/tools/error_index_generator`)
 - #148649 (don't completely reset `HeadUsages`)
 - #148675 (Remove eslint-js from npm dependencies)

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

rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names

Resolves rust-lang#148275 by preventing name collisions in the `#[bench]` macro.

Previously, a user-defined function named "b" could not be benchmarked because
the macro-generated lambda identity collided with the same name. We now generate
the lambda ident as `__bench_<function_name>`, ensuring it is always distinct
from the user’s function.

Because the prefix is applied recursively (e.g. benchmarking `__bench_b`
produces a lambda ident `__bench___bench_b`), there is no possible function
name that can equal its corresponding lambda ident. This guarantees that
the user can safely bench a function of any valid name without risk of
identifier collision.

rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names

Resolves rust-lang#148275 by preventing name collisions in the `#[bench]` macro.

Previously, a user-defined function named "b" could not be benchmarked because
the macro-generated lambda identity collided with the same name. We now generate
the lambda ident as `__bench_<function_name>`, ensuring it is always distinct
from the user’s function.

Because the prefix is applied recursively (e.g. benchmarking `__bench_b`
produces a lambda ident `__bench___bench_b`), there is no possible function
name that can equal its corresponding lambda ident. This guarantees that
the user can safely bench a function of any valid name without risk of
identifier collision.

rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names

Resolves rust-lang#148275 by preventing name collisions in the `#[bench]` macro.

Previously, a user-defined function named "b" could not be benchmarked because
the macro-generated lambda identity collided with the same name. We now generate
the lambda ident as `__bench_<function_name>`, ensuring it is always distinct
from the user’s function.

Because the prefix is applied recursively (e.g. benchmarking `__bench_b`
produces a lambda ident `__bench___bench_b`), there is no possible function
name that can equal its corresponding lambda ident. This guarantees that
the user can safely bench a function of any valid name without risk of
identifier collision.

Rollup of 22 pull requests

Successful merges:

 - #128666 (Add `overflow_checks` intrinsic)
 - #146305 (Add correct suggestion for multi-references for self type in method)
 - #147179 ([DebugInfo] Fix container types failing to find template args)
 - #147743 (Show packed field alignment in mir_transform_unaligned_packed_ref)
 - #148079 (Rename `downcast_[ref|mut]_unchecked` -> `downcast_unchecked_[ref|mut]`)
 - #148084 (Optimize path components iteration on platforms that don't have prefixes)
 - #148126 (Fix rust stdlib build failing for VxWorks)
 - #148204 (Modify contributor email entries in .mailmap)
 - #148279 (rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names)
 - #148333 (constify result unwrap unchecked)
 - #148539 (Add Allocator proxy impls for Box, Rc, and Arc)
 - #148601 (`invalid_atomic_ordering`: also lint `update` & `try_update`)
 - #148612 (Add note for identifier with attempted hygiene violation)
 - #148613 (Switch hexagon targets to rust-lld)
 - #148619 (Enable std locking functions on AIX)
 - #148644 ([bootstrap] Make `--open` option work with `doc src/tools/error_index_generator`)
 - #148649 (don't completely reset `HeadUsages`)
 - #148673 (Remove a remnant of `dyn*` from the parser)
 - #148675 (Remove eslint-js from npm dependencies)
 - #148680 (Recover `[T: N]` as `[T; N]`)
 - #148688 (Remove unused argument `features` from `eval_config_entry`)
 - #148711 (Use the current lint note id when parsing `cfg!()`)

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

Rollup merge of #148279 - IntegralPilot:master, r=hkBst

rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names

Resolves #148275 by preventing name collisions in the `#[bench]` macro.

Previously, a user-defined function named "b" could not be benchmarked because
the macro-generated lambda identity collided with the same name. We now generate
the lambda ident as `__bench_<function_name>`, ensuring it is always distinct
from the user’s function.

Because the prefix is applied recursively (e.g. benchmarking `__bench_b`
produces a lambda ident `__bench___bench_b`), there is no possible function
name that can equal its corresponding lambda ident. This guarantees that
the user can safely bench a function of any valid name without risk of
identifier collision.

rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names

Resolves rust-lang#148275 by preventing name collisions in the `#[bench]` macro.

Previously, a user-defined function named "b" could not be benchmarked because
the macro-generated lambda identity collided with the same name. We now generate
the lambda ident as `__bench_<function_name>`, ensuring it is always distinct
from the user’s function.

Because the prefix is applied recursively (e.g. benchmarking `__bench_b`
produces a lambda ident `__bench___bench_b`), there is no possible function
name that can equal its corresponding lambda ident. This guarantees that
the user can safely bench a function of any valid name without risk of
identifier collision.