`needless_pass_by_ref_mut` should not be emitted for functions containing `unsafe`

[Ralith]

Description

A unique borrow can be required for soundness in a function that performs unsafe operations which do not directly use a reference, e.g. using raw pointers or over FFI.

Version

rustc 1.74.0-nightly (2f5df8a94 2023-08-31)
binary: rustc
commit-hash: 2f5df8a94bb3c5fae4e3fcbfc8ef20f1f976cb19
commit-date: 2023-08-31
host: x86_64-unknown-linux-gnu
release: 1.74.0-nightly
LLVM version: 17.0.0

Additional Labels

No response