Rollup merge of #121318 - kadiwa4:no_assembly_in_supposedly_safe_code, r=Nilstrieb

Trigger `unsafe_code` lint on invocations of `global_asm`

`unsafe_code` already warns about things that don't involve the `unsafe` keyword, e.g. `#[no_mangle]`. This makes it warn on `core::arch::global_asm` too.

Fixes #103078

compiler/rustc_lint/src/builtin.rs

@@ -393,6 +393,10 @@ impl EarlyLintPass for UnsafeCode {
                 }
             }
 
+            ast::ItemKind::GlobalAsm(..) => {
+                self.report_unsafe(cx, it.span, BuiltinUnsafe::GlobalAsm);
+            }
+
             _ => {}
         }
     }