Automatic toolchain upgrade to nightly-2023-09-17

[github-actions]

Update Rust toolchain from nightly-2023-09-16 to nightly-2023-09-17 without any other source changes.
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@20999de up to rust-lang/rust@7d9bce3. The log for this commit range is:
rust-lang/rust@7d9bce3273 Auto merge of #115900 - matthiaskrgr:rollup-3ba15da, r=matthiaskrgr
rust-lang/rust@e2ea347517 Rollup merge of #115895 - 52:patch-docs-vec-truncate, r=dtolnay
rust-lang/rust@5a8179bf5a Rollup merge of #115890 - GuillaumeGomez:migrate-gui-test-color-41, r=notriddle
rust-lang/rust@abae2b66e8 Rollup merge of #115884 - RalfJung:const-debug-print, r=oli-obk
rust-lang/rust@edea0d5179 Rollup merge of #115836 - RalfJung:rust_analyzer_settings.json, r=compiler-errors
rust-lang/rust@633f143921 Rollup merge of #115560 - ShE3py:format-results, r=dtolnay
rust-lang/rust@b8c4b78a79 Rollup merge of #115487 - ModProg:patch-1, r=dtolnay
rust-lang/rust@edfe8b4434 Rollup merge of #115329 - xzmeng:fix-std-doc, r=dtolnay
rust-lang/rust@cf9ce96a5b Rollup merge of #115247 - the8472:life-before-main, r=dtolnay
rust-lang/rust@341ef15eee Auto merge of #115733 - Zoxc:group-dep-node-kinds, r=cjgillot
rust-lang/rust@4514fb98d5 Auto merge of #112229 - clarfonthey:range-iter-count, r=dtolnay
rust-lang/rust@409e7f6f21 Auto merge of #115894 - matthiaskrgr:rollup-pe5efh4, r=matthiaskrgr
rust-lang/rust@5a3410ad1a make ty::Const debug printing less verbose
rust-lang/rust@1c7a77a638 edit std::collections::VecDeque docs
rust-lang/rust@d1ff5e174b edit std::vec::Vec::truncate docs
rust-lang/rust@04edb2bab8 Rollup merge of #115885 - RalfJung:dont-ignore-ice, r=oli-obk
rust-lang/rust@77e0102d19 Rollup merge of #115867 - Zalathar:debug, r=oli-obk
rust-lang/rust@ab90d708da Rollup merge of #115860 - Soveu:varargs2, r=WaffleLapkin
rust-lang/rust@41bafc4ff3 Auto merge of #110800 - GuillaumeGomez:custom_code_classes_in_docs, r=t-rustdoc
rust-lang/rust@42dead4d23 Auto merge of #115889 - matthiaskrgr:rollup-kfmauvh, r=matthiaskrgr
rust-lang/rust@e691752210 Migrate GUI colors test to original CSS color format
rust-lang/rust@53cd9783c5 Rollup merge of #115866 - RalfJung:interpret-debug, r=compiler-errors
rust-lang/rust@c2f228f654 Rollup merge of #115607 - RalfJung:safe-traits-unsafe-code, r=dtolnay
rust-lang/rust@e39c39346b Fix invalid markdown codeblock label
rust-lang/rust@fd70f7eea2 Auto merge of #115740 - tmiasko:cache-reachable-set, r=cjgillot
rust-lang/rust@ec1d04967d don't globally ignore rustc-ice files
rust-lang/rust@08aa6c9b65 Specialize count for range iterators
rust-lang/rust@790309b102 Auto merge of #115315 - RalfJung:field-capture-packed-alignment, r=oli-obk
rust-lang/rust@635c4a5e61 Auto merge of #114494 - est31:extend_useless_ptr_null_checks, r=jackh726
rust-lang/rust@91e0b46f76 coverage: Replace an unnecessary map with a set
rust-lang/rust@3b5b1aa2a5 coverage: Simplify internal representation of debug types
rust-lang/rust@d0d1187ebb coverage: Update log module names in debug docs
rust-lang/rust@d79cd17199 coverage: Arrange imports in rustc_mir_transform::coverage::debug
rust-lang/rust@e81f85fe9e Auto merge of #115520 - Finomnis:const_transmute_copy, r=dtolnay
rust-lang/rust@c48e6ffce5 Auto merge of #115829 - notriddle:notriddle/rustdoc-theme-css-merge, r=GuillaumeGomez
rust-lang/rust@71cab64079 special case TyAndLayout debug impl
rust-lang/rust@7c72edf19f Update documentation for custom_code_classes_in_docs feature
rust-lang/rust@f038f180fd Add custom tag for markdown codeblocks
rust-lang/rust@113220b970 Update to new emit_error API
rust-lang/rust@87d2aa5fd3 Improve error emitting code
rust-lang/rust@bbaa930b35 Fix compilation error "the trait bound SubdiagnosticMessage: From<&std::string::String> is not satisfied"
rust-lang/rust@6e21e4823d Fix incorrect codeblock attributes in docs
rust-lang/rust@5f3002ebeb Add eBNF and documentation on TagIterator
rust-lang/rust@7681f63cab Implement new eBNF for codeblock attributes
rust-lang/rust@4ce17fa30e Add support for double quotes in markdown codeblock attributes
rust-lang/rust@d829fee6b5 Add documentation for custom_code_classes_in_docs feature
rust-lang/rust@f5561842e3 Add tests for custom_code_classes_in_docs feature
rust-lang/rust@5515fc88dc Implement custom classes for rustdoc code blocks with custom_code_classes_in_docs feature
rust-lang/rust@ab41e2b6dc rustdoc: avoid calling document.write after the page loads
rust-lang/rust@7e86fd61e8 rustdoc: merge theme css into rustdoc.css
rust-lang/rust@06a76ab415 make interpreter type Debug impl independent of Ty debug impl
rust-lang/rust@eea6149e03 Enable varargs support for AAPCS calling convention
rust-lang/rust@9af39a69ac update SETTINGS_HASHES
rust-lang/rust@6dbcf5fc81 update rust_analyzer_settings.json
rust-lang/rust@f8ad88be81 Use UnhashMap for the index
rust-lang/rust@734e5a1fbd Encode the number of dep kinds encountered in the dep graph
rust-lang/rust@8c5bc990cc Store a index per dep node kind
rust-lang/rust@5d3244ce9b Cache reachable_set on disk
rust-lang/rust@62111145b7 clarify that unsafe code must not rely on our safe traits
rust-lang/rust@94e651b9b2 Update doc for alloc::format! and core::concat!
rust-lang/rust@0bb54814e1 Stabilize const_transmute_copy
rust-lang/rust@f4795382ef Improve documentation on when signes are printed by default
rust-lang/rust@57fccf9e5b fix std::primitive doc: homogenous -> homogeneous
rust-lang/rust@3431fb7b61 fix a doc typo at std::os::unix::fs::FileExt::write_at
rust-lang/rust@a671127941 closure field capturing: don't depend on alignment of packed fields
rust-lang/rust@b96db2273b Document std limitations before/after main
rust-lang/rust@4b1bc27010 Improve diagnostics and add tests for function calls
rust-lang/rust@8faac74e54 Remove ptr_from_mut diagnostic item
rust-lang/rust@33970db8c6 Add #[rustc_never_returns_null_ptr] to std functions
rust-lang/rust@8cfa4fe6b2 Add #[rustc_never_returns_null_ptr]