Automatic toolchain upgrade to nightly-2025-10-01

[github-actions]

Update Rust toolchain from nightly-2025-09-30 to nightly-2025-10-01 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@dc2c356 up to
rust-lang/rust@fa3155a. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/fa3155a644 Auto merge of #147197 - matthiaskrgr:rollup-du5e4pv, r=matthiaskrgr

rust-lang/rust@561e02cea0 Rollup merge of #147187 - lcnr:rarw, r=lqd
rust-lang/rust@6e577e18c6 Rollup merge of #147181 - Zalathar:fixed-metadata, r=petrochenkov
rust-lang/rust@4cbaa70101 Rollup merge of #147172 - notriddle:tooldoc, r=Kobzol
rust-lang/rust@622ca20e78 Rollup merge of #147166 - cyrgani:proc-macro-cleanup-1, r=petrochenkov
rust-lang/rust@f7c7e34ae4 Rollup merge of #146886 - taiki-e:rc-inner-align, r=Mark-Simulacrum
rust-lang/rust@61b9467af8 Rollup merge of #142506 - clarfonthey:path-trailing-sep, r=joboet
rust-lang/rust@42d009c0a9 Auto merge of #147186 - Zalathar:rollup-sza9wxl, r=Zalathar
rust-lang/rust@ba13b6ec6f bootstrap: build bootstrap docs with in-tree rustdoc
rust-lang/rust@198777a08e remove unnecessary test directives
rust-lang/rust@22643032d4 Rollup merge of #147167 - jyn514:rustdoc-tests, r=Kobzol
rust-lang/rust@156d150381 Rollup merge of #147109 - BoxyUwU:rename_concrete_opaques, r=lcnr
rust-lang/rust@5a6ac8c322 Rollup merge of #146649 - folkertdev:cmse-call-erase-regions, r=lcnr
rust-lang/rust@1aa426b335 Rollup merge of #146011 - estebank:lifetime-obligation-span, r=lcnr
rust-lang/rust@97e2d3c579 Rollup merge of #140916 - moatom:140578, r=chenyukang
rust-lang/rust@cc6329a9bc Replace MetadataType with the MetadataKindId constants
rust-lang/rust@906bf49ade Declare all "fixed" metadata kinds as MetadataKindId
rust-lang/rust@cd40bbfe29 Move MetadataKindId into its own submodule
rust-lang/rust@b13b87a1c3 Fix unuseful span in type error in some format_args!() invocations
rust-lang/rust@0fd6f1113b Add test for unuseful span in type error in some format_args!() invocations
rust-lang/rust@a2db928053 Auto merge of #147143 - estebank:verbose-ret-type, r=fee1-dead
rust-lang/rust@c5dc558e6c Auto merge of #147169 - jhpratt:rollup-65ooei8, r=jhpratt
rust-lang/rust@745b8f6b74 Rollup merge of #147153 - GuillaumeGomez:doc-propagation-before-stripping-items, r=lolbinarycat
rust-lang/rust@afd620f548 Rollup merge of #147152 - lcnr:instantiate-pre-sized-check, r=BoxyUwU
rust-lang/rust@b310eb91ab Rollup merge of #146457 - alexcrichton:wasm-no-exn-instructions, r=bjorn3
rust-lang/rust@c3e118b4db Rollup merge of #145883 - shepmaster:unify-macos-ci, r=madsmtm
rust-lang/rust@73f6b08022 Don't condition RUSTDOC_LIBDIR on --no-doc
rust-lang/rust@29b7717de2 Auto merge of #147162 - matthiaskrgr:rollup-4bv1xzb, r=matthiaskrgr
rust-lang/rust@379979951e Rollup merge of #147150 - nikic:alloc-shim-attributes, r=bjorn3
rust-lang/rust@967e64279a Rollup merge of #147133 - GuillaumeGomez:rm-loop-extract_cfg_from_attrs, r=lolbinarycat
rust-lang/rust@fdb965f3f7 Rollup merge of #147131 - cjgillot:patch-branches, r=davidtwco
rust-lang/rust@618942b86f Rollup merge of #147040 - joshtriplett:mbe-fix-comments, r=petrochenkov
rust-lang/rust@8223831942 Rollup merge of #146937 - joboet:gethostname, r=Mark-Simulacrum

[tautschnig]

Looks like we are affected by https://www.githubstatus.com/incidents/071h21gptcp0. Will re-run jobs once status is green again.