Automatic toolchain upgrade to nightly-2025-05-08

[github-actions]

Update Rust toolchain from nightly-2025-05-07 to nightly-2025-05-08 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@27d6200 up to
rust-lang/rust@e9f8103. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/e9f8103f93 Auto merge of #140590 - lcnr:closure-in-dead-code, r=compiler-errors

rust-lang/rust@3ef8e64ce9 Auto merge of #139758 - Zoxc:thread-local-graph, r=oli-obk
rust-lang/rust@db0e836148 Auto merge of #140735 - GuillaumeGomez:rollup-dlhbxsg, r=GuillaumeGomez
rust-lang/rust@aca12a8216 Rollup merge of #140724 - tgross35:update-builtins, r=tgross35
rust-lang/rust@763209e422 Rollup merge of #140719 - wyfo:patch-1, r=lcnr
rust-lang/rust@6e2c39b568 Rollup merge of #140398 - Berrysoft:cygwin-backtrace, r=tgross35
rust-lang/rust@d396619af0 Rollup merge of #139518 - xizheyin:issue-138527, r=traviscross
rust-lang/rust@f76c7367c6 Auto merge of #137995 - hkBst:parse_format_reuse_unescape, r=nnethercote
rust-lang/rust@fe64184b16 Fix backtrace for cygwin
rust-lang/rust@891b852547 Auto merge of #140726 - jhpratt:rollup-b6oxopx, r=jhpratt
rust-lang/rust@3d8ef7afca Rollup merge of #140713 - compiler-errors:check_ref_cast, r=lcnr
rust-lang/rust@8984d650e1 Rollup merge of #140709 - notriddle:rm-unportable-markdown, r=GuillaumeGomez
rust-lang/rust@5b165aab89 Rollup merge of #140668 - vkrivopalov:vecdeque-truncate-front, r=jhpratt
rust-lang/rust@fe97fe45f8 Rollup merge of #140656 - joboet:fuchsia_pal, r=workingjubilee
rust-lang/rust@bda326f40c Rollup merge of #140607 - lcnr:opaque-type-storage, r=compiler-errors
rust-lang/rust@25631ff093 Rollup merge of #140483 - baumanj:patch-1, r=workingjubilee
rust-lang/rust@b7199a69d6 Rollup merge of #140419 - Jarcho:ctxt_external, r=Nadrieril
rust-lang/rust@4a8dbe0537 Rollup merge of #139534 - madhav-madhusoodanan:apx-target-feature-addition, r=workingjubilee
rust-lang/rust@60a4b939a3 Rollup merge of #134273 - RalfJung:de-stabilize-bench, r=ibraheemdev,traviscross
rust-lang/rust@4de822c3d2 Update compiler-builtins to 0.1.158
rust-lang/rust@49ac393688 fix typo in autorefs lint doc example
rust-lang/rust@669c1ab967 Auto merge of #140514 - m-ou-se:proc-macro-span-file, r=Amanieu
rust-lang/rust@6a4af821b0 Update rc.rs docs
rust-lang/rust@636a138cda Structurally resolve in check_ref_cast
rust-lang/rust@c32dc2dbda Added apxf target feature test
rust-lang/rust@43357b4a64 Added apxf target feature support, under flag apx_target_feature
rust-lang/rust@e648e5b710 rustdoc: remove unportable markdown lint and old parser
rust-lang/rust@cdd104922d Use the portable AtomicU64
rust-lang/rust@431f02d531 support duplicates in the opaque_types_storage
rust-lang/rust@3d4737fb5e Remove duplicate impl of string unescape
rust-lang/rust@e1e8857d54 Add some comments about thread local indices
rust-lang/rust@aeab2819f6 Tweak index chunk allocation
rust-lang/rust@cdf4143eb8 Implement VecDeque::truncate_front()
rust-lang/rust@7845c011dd collect all Fuchsia bindings into the fuchsia module
rust-lang/rust@e4272d12f2 feat: Added capability to add multiple dependencies for an LLVMFeature
rust-lang/rust@ffa7d1ee5d borrowck nested items in dead code
rust-lang/rust@c43a6f05d6 Add some comments
rust-lang/rust@d3ec14bbec Use thread local dep graph encoding
rust-lang/rust@2a053c7a15 Update doc comments.
rust-lang/rust@d6ae459af8 Stabilize proc_macro::Span::{file, local_file}.
rust-lang/rust@dd20225681 Update rc.rs docs
rust-lang/rust@ea6844560a Move in_external_macro to SyntaxContext
rust-lang/rust@b840942d1d Stabilize precise capture syntax in style guide
rust-lang/rust@f5c63b9e63 the soft_unstable lint cannot have an example that will keep working
rust-lang/rust@8e599b0daa de-stabilize bench attribute