Lint "disallowed-methods" does not work with pointer methods.

Summary

I wanted to blacklist as_ref() / as_mut() methods on raw pointers, but it seems that it doesn't work with Clippy's "disallowed-methods".

Reproducer

My config in clippy.toml:

disallowed-methods = [
    "std::ptr::as_ref",
    "std::ptr::as_mut",
    "core::ptr::const_ptr::as_ref",
    "core::ptr::mut_ptr::as_mut",
    "pointer::as_ref",
    "pointer::as_mut"
]

Example code:

fn main() {
    let x = 123;
    let ptr: *const i32 = &x;
    let x2 = unsafe { ptr.as_ref().unwrap() };
    println!("Hello, world! {x2}");
}

I expected Clippy to complain about as_ref() call but it didn't.

Version

rustc 1.66.0 (69f9c33d7 2022-12-12)
binary: rustc
commit-hash: 69f9c33d71c871fc16ac445211281c6e7a340943
commit-date: 2022-12-12
host: x86_64-unknown-linux-gnu
release: 1.66.0
LLVM version: 15.0.2

Additional Labels

No response

Start with the provided clippy.toml and Rust reproducer, confirming that disallowed-methods does not report the pointer as_ref() call. Trace the disallowed-methods lint from its entry point and add coverage for the reproduced calls; done means the configured pointer methods produce diagnostics.