…, r=jdonszelmann

Port `#[export_name]` to the new attribute parsing infrastructure

This PR contains two changes, in separate commits for reviewability:
- Ports `export_name` to the new attribute parsing infrastructure for rust-lang#131229 (comment)
- Moves the check for mixing export_name/no_mangle to check_attr.rs and improve the error message, which previously had a mix of 2021/2024 edition syntax

r? `@jdonszelmann`

…rors

Rollup of 18 pull requests

Successful merges:

 - #137843 (make RefCell unstably const)
 - #140942 (const-eval: allow constants to refer to mutable/external memory, but reject such constants as patterns)
 - #142549 (small iter.intersperse.fold() optimization)
 - #142637 (Remove some glob imports from the type system)
 - #142647 ([perf] Compute hard errors without diagnostics in impl_intersection_has_impossible_obligation)
 - #142700 (Remove incorrect comments in `Weak`)
 - #142927 (Add note to `find_const_ty_from_env`)
 - #142967 (Fix RwLock::try_write documentation for WouldBlock condition)
 - #142986 (Port `#[export_name]` to the new attribute parsing infrastructure)
 - #143001 (Rename run always )
 - #143010 (Update `browser-ui-test` version to `0.20.7`)
 - #143015 (Add `sym::macro_pin` diagnostic item for `core::pin::pin!()`)
 - #143033 (Expand const-stabilized API links in relnotes)
 - #143041 (Remove cache for citool)
 - #143056 (Move an ACE test out of the GCI directory)
 - #143059 (Fix 1.88 relnotes)
 - #143067 (Tracking issue number for `iter_macro`)
 - #143073 (Fix some fixmes that were waiting for let chains)

Failed merges:

 - #143020 (codegen_fn_attrs: make comment more precise)

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

Rollup merge of #142986 - JonathanBrouwer:export_name_parser, r=jdonszelmann

Port `#[export_name]` to the new attribute parsing infrastructure

This PR contains two changes, in separate commits for reviewability:
- Ports `export_name` to the new attribute parsing infrastructure for #131229 (comment)
- Moves the check for mixing export_name/no_mangle to check_attr.rs and improve the error message, which previously had a mix of 2021/2024 edition syntax

r? ``@jdonszelmann``

…mpiler-errors

Rollup of 18 pull requests

Successful merges:

 - rust-lang#137843 (make RefCell unstably const)
 - rust-lang#140942 (const-eval: allow constants to refer to mutable/external memory, but reject such constants as patterns)
 - rust-lang#142549 (small iter.intersperse.fold() optimization)
 - rust-lang#142637 (Remove some glob imports from the type system)
 - rust-lang#142647 ([perf] Compute hard errors without diagnostics in impl_intersection_has_impossible_obligation)
 - rust-lang#142700 (Remove incorrect comments in `Weak`)
 - rust-lang#142927 (Add note to `find_const_ty_from_env`)
 - rust-lang#142967 (Fix RwLock::try_write documentation for WouldBlock condition)
 - rust-lang#142986 (Port `#[export_name]` to the new attribute parsing infrastructure)
 - rust-lang#143001 (Rename run always )
 - rust-lang#143010 (Update `browser-ui-test` version to `0.20.7`)
 - rust-lang#143015 (Add `sym::macro_pin` diagnostic item for `core::pin::pin!()`)
 - rust-lang#143033 (Expand const-stabilized API links in relnotes)
 - rust-lang#143041 (Remove cache for citool)
 - rust-lang#143056 (Move an ACE test out of the GCI directory)
 - rust-lang#143059 (Fix 1.88 relnotes)
 - rust-lang#143067 (Tracking issue number for `iter_macro`)
 - rust-lang#143073 (Fix some fixmes that were waiting for let chains)

Failed merges:

 - rust-lang#143020 (codegen_fn_attrs: make comment more precise)

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