Bump itertools

changelog: none

This change simply moves the `rust` macro definition directly into the
attributes for `*.rs` files.

git commands that recurse from the rust toplevel tree into submodules
produce errors in clippy due to the fact that:

  "Custom macro attributes can be defined only in top-level
  gitattributes files"

For example, from the toplevel `rust` directory in a rustc development
build, try:

  $ git grep "search string" --recurse-submodules

Embedded within the actual results is the error message:

  [attr]rust text eol=lf whitespace=tab-in-indent,trailing-space,tabwidth=4
   not allowed: src/tools/clippy/.gitattributes:1

…ng lints" section.

readme: move "how to run single lint" instructions to "Allowing/denying lints" section.

changelog: none

git attribute macros not allowed in submodules

This change simply moves the `rust` macro definition directly into the
attributes for `*.rs` files.

git commands that recurse from the rust toplevel tree into submodules
produce errors in clippy due to the fact that:

  "Custom macro attributes can be defined only in top-level
  gitattributes files"

For example, from the toplevel `rust` directory in a rustc development
build, try:

  $ git grep "search string" --recurse-submodules

Embedded within the actual results is the error message:

  [attr]rust text eol=lf whitespace=tab-in-indent,trailing-space,tabwidth=4
   not allowed: src/tools/clippy/.gitattributes:1

Thank you for making Clippy better!

We're collecting our changelog from pull request descriptions.
If your PR only updates to the latest nightly, you can leave the
`changelog` entry as `none`. Otherwise, please write a short comment
explaining your change.

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PR description. This way the issue will be automatically closed when
your PR is merged.

If you added a new lint, here's a checklist for things that will be
checked during review or continuous integration.

- [ ] Followed [lint naming conventions][lint_naming]
- [ ] Added passing UI tests (including committed `.stderr` file)
- [ ] `cargo test` passes locally
- [ ] Executed `cargo dev update_lints`
- [ ] Added lint documentation
- [ ] Run `cargo dev fmt`

[lint_naming]: https://rust-lang.github.io/rfcs/0344-conventions-galore.html#lints

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Delete this line and everything above before opening your PR.

---

changelog: none

Rustup to rust-lang/rust#70449

cc rust-lang/rust#70449

changelog: none

Deprecate REPLACE_CONSTS lint

Closes #5346
changelog: Deprecate `replace_consts` lint

rustup  rust-lang/rust#70536

changelog: none