Refactor casts lint
Ref: #6724
Changes:
1. Separate the `casts` group from the `types` group.
2. Reorganize the lints of the `casts` group into their own modules.
Notes:
1. I didn't `fix` #6874 in order to maintain this PR as small as possible.
---
changelog: none
or-patterns: disallow in `let` bindings
~~Blocked on https://github.com/rust-lang/rust/pull/81869~~
Disallows top-level or-patterns before type ascription. We want to reserve this syntactic space for possible future generalized type ascription.
r? ``@petrochenkov``
Opt-in to rustc_private for `rust-analyzer`
rust-analyzer/rust-analyzer#7891
changelog: none
This will also help priroda and any other package which depends on the `miri` library crate.
Refactor types lints
Ref #6724.
As described in #6724, `types.rs` contains many groups inside it.
In this PR, I reorganize the lints of the `types` group into their own modules.
changelog: none
Let Cargo track CLIPPY_ARGS
This PR makes `clippy-driver` emit `CLIPPY_ARGS` in its `dep-info` output.
Just like #6441, this allows this workflow to work:
```shell
cargo clippy # warning: empty `loop {}` wastes CPU cycles
cargo clippy -- -A clippy::empty_loop # no warnings emitted
```
But without rebuilding all dependencies.
cc https://rust-lang.zulipchat.com/#narrow/stream/257328-clippy/topic/CLIPPY_ARGS.20is.20not.20tracked.20by.20Cargo/near/228599088
changelog: Cargo now re-runs Clippy if arguments after `--` provided to `cargo clippy` are changed.
migrate paths to newly-added diagnostic items
This gets rid of the following paths:
* OS_STRING
* TO_OWNED
* TO_STRING
Removes some usages of:
* PATH_BUF
Per #5393
also removes unneeded `is_ty_param_path` from `clippy_lints::types` and relocates `is_ty_param_lang_item` and `is_ty_param_diagnostic_item` to `clippy_utils`.
changelog: none
