Automatic toolchain upgrade to nightly-2025-09-22

[github-actions]

Update Rust toolchain from nightly-2025-09-21 to nightly-2025-09-22 without any other source changes.

[github-actions]

This is an automatically generated pull request. If any of the CI checks fail,
manual intervention is required. In such a case, review the changes at
https://github.com/rust-lang/rust from
rust-lang/rust@dd7fda5 up to
rust-lang/rust@9f32ccf. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/9f32ccf35f Auto merge of #146862 - matthiaskrgr:rollup-1zqootr, r=matthiaskrgr

rust-lang/rust@adfc111fff Rollup merge of #146639 - joboet:shared-stdiopipes, r=Mark-Simulacrum
rust-lang/rust@af315d3027 Rollup merge of #146606 - Enselic:test-test-args, r=Mark-Simulacrum
rust-lang/rust@c0f5eefa27 Rollup merge of #146486 - ferrocene:pvdrz/improve-atomic-coverage, r=ibraheemdev
rust-lang/rust@7148a4f543 Rollup merge of #143857 - Periodic1911:macro-export, r=jdonszelmann
rust-lang/rust@87a00f67ba std: merge definitions of StdioPipes
rust-lang/rust@7e4b8d702f Auto merge of #146659 - cjgillot:impossible-taint, r=oli-obk
rust-lang/rust@f7fa83ec62 Changes to uitests for macro_export port
rust-lang/rust@6abcadc235 Port #[macro_export] to the new attribute parsing infrastructure
rust-lang/rust@6710835ae7 Auto merge of #146592 - Kobzol:tidy-diag, r=jieyouxu
rust-lang/rust@4c208f5c64 Implement output of colored messages with optional check context
rust-lang/rust@352fa3960a Migrate the remaining tidy checks to diagnostics
rust-lang/rust@c36faff900 Add CheckId, migrate the alphabetical check to diagnostics
rust-lang/rust@b0010dd5ae Add diagnostics context and migrate the style check to it
rust-lang/rust@1d23da6b73 Auto merge of #146779 - GuillaumeGomez:gcc-ignore-test_ui_abi, r=Kobzol,jieyouxu
rust-lang/rust@dfa22235d8 Auto merge of #146830 - Zalathar:rollup-lj8jfok, r=Zalathar
rust-lang/rust@5224279572 Rollup merge of #146822 - saethlin:bbbbbstd, r=Noratrieb
rust-lang/rust@be395723b5 Rollup merge of #146820 - cammeresi:alloc-20250919, r=tgross35
rust-lang/rust@92ea947c78 Rollup merge of #146793 - folkertdev:naked-asm-func-end, r=Amanieu
rust-lang/rust@5c1c47925e Rollup merge of #146744 - beepster4096:derefs_in_ref_prop, r=cjgillot
rust-lang/rust@6333a8b9fe Rollup merge of #146551 - folkertdev:cmse-entry-c-variadic, r=workingjubilee
rust-lang/rust@b0c55c8554 Rollup merge of #145664 - Darksonn:stab-file-with-nul, r=Mark-Simulacrum
rust-lang/rust@7a5819d154 Rollup merge of #144091 - thaliaarchi:stabilize-new-zeroed, r=Mark-Simulacrum
rust-lang/rust@d2533189de Rollup merge of #140983 - tkr-sh:master, r=ibraheemdev