Inline assembly has no semantic highlighting

Inline assembly doesn't have any semantic highlighting, even though this was added in https://github.com/rust-lang/rust-analyzer/issues/6031.

All asm!()/global_asm/naked_asm calls are just highlighted as strings.

It's possible I am missing some sort of configuration option, but I haven't seen anything of the sort in the rust-analyzer settings.

rust-analyzer version: 0.4.2715-standalone (f5a83fb3b5 2025-12-11)

rustc version: rustc 1.92.0-nightly (7ac0330c6 2025-09-25)

editor or extension: VS Code 1.106.3, RA extension 0.4.2715, Theme: Default Dark Modern

relevant settings: Rust target is aarch64-apple-darwin, but I've tested on multiple

code snippet to reproduce:

use std::arch::asm;

fn main() {
    unsafe {
        asm!("
            @ Perform a nop instruction.
            nop
        ");
    }
}

Start with the Rust snippet in the issue and reproduce the highlighting for asm!(), global_asm, and naked_asm in the listed VS Code and rust-analyzer versions. Trace the semantic-highlighting path for these calls and compare it with the behavior described in issue 6031. Done means inline assembly is highlighted semantically rather than entirely as strings, with the relevant behavior covered by tests.