Automatic toolchain upgrade to nightly-2025-12-05

[github-actions]

Update Rust toolchain from nightly-2025-12-04 to nightly-2025-12-05 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@83e49b7 up to
rust-lang/rust@b33119f. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/b33119ffdd Auto merge of #149642 - GuillaumeGomez:subtree-update_cg_gcc_2025-12-04, r=GuillaumeGomez

rust-lang/rust@29e035e172 Auto merge of #149632 - matthiaskrgr:rollup-c5iqgtn, r=matthiaskrgr
rust-lang/rust@94f1bfe1fc Merge commit 'dab6863ce82346cf56c88b6f90a146200358207f' into subtree-update_cg_gcc_2025-12-04
rust-lang/rust@5372fc9cb7 Auto merge of #149586 - tgross35:update-builtins, r=tgross35
rust-lang/rust@ac607e0d91 Rollup merge of #149610 - quaternic:gather-scatter-bits-bench, r=Mark-Simulacrum
rust-lang/rust@5c4915734d Rollup merge of #149608 - pmur:murp/ppc-clobber-speacc, r=Amanieu
rust-lang/rust@c598b4e300 Rollup merge of #149597 - jdonszelmann:revert-iterator-exactly-one, r=wafflelapkin
rust-lang/rust@6e8e08cc32 Rollup merge of #149595 - reddevilmidzy:t9, r=Kivooeo
rust-lang/rust@d709cd67e2 Rollup merge of #149579 - moturus:fix-thread-new, r=joboet
rust-lang/rust@b54ff3d78c Rollup merge of #149574 - jieyouxu:compiletest-cli, r=Zalathar
rust-lang/rust@c3abbc6ce4 Rollup merge of #149570 - robamu:rename-cortex-ar-to-aarch32, r=ehuss
rust-lang/rust@a411fe8f8d Rollup merge of #149545 - WaffleLapkin:type_ascribe2, r=jackh726
rust-lang/rust@5c9a4eed87 Rollup merge of #149544 - reddevilmidzy:where, r=fmease
rust-lang/rust@170fffd31d Rollup merge of #149521 - a1phyr:improve_io_error, r=joboet
rust-lang/rust@b1b08cdef5 Auto merge of #149631 - matthiaskrgr:rollup-jbx443u, r=matthiaskrgr
rust-lang/rust@eeff7ad20f Rollup merge of #149569 - blyxyas:mailmap, r=Mark-Simulacrum
rust-lang/rust@62a42e8a31 Rollup merge of #149557 - folkertdev:c-variadic-not-supported, r=workingjubilee
rust-lang/rust@b63ef74e5a Rollup merge of #149554 - mati865:build-manifest-more-gen, r=Mark-Simulacrum
rust-lang/rust@5105c4fcae Rollup merge of #149550 - bjorn3:faster_compile_time_deps, r=RalfJung
rust-lang/rust@05b2958024 Rollup merge of #149549 - Jamesbarford:chore/regression-test-ttbr0_el2, r=WaffleLapkin
rust-lang/rust@8fe12253f7 Rollup merge of #149539 - quaternic:gather-scatter-bits, r=Mark-Simulacrum
rust-lang/rust@420ef95cd7 Rollup merge of #149528 - fee1-dead-contrib:rangeboundreword, r=jieyouxu
rust-lang/rust@40c97a9279 Rollup merge of #149501 - lcnr:no-hard-error-on-norm-failure, r=lqd,oli-obk
rust-lang/rust@08a5519924 Rollup merge of #149456 - joboet:async-safe-tid, r=Mark-Simulacrum
rust-lang/rust@bea2f89de6 Rollup merge of #149183 - tiif:typing_env_fix, r=BoxyUwU
rust-lang/rust@82a17b30d8 Rollup merge of #149147 - chenyukang:yukang-fix-unused_assignments-macro-gen-147648, r=JonathanBrouwer
rust-lang/rust@5019bdaefe Rollup merge of #147841 - jdonszelmann:test-macro-ice, r=wafflelapkin
rust-lang/rust@556beb9ec7 Auto merge of #149602 - lnicola:sync-from-ra, r=lnicola
rust-lang/rust@5325015e29 Auto merge of #149600 - mati865:restore-msys2, r=Kivooeo,tgross35