Rollup merge of #139001 - folkertdev:naked-function-rustic-abi, r=traviscross,compiler-errors

add `naked_functions_rustic_abi` feature gate

tracking issue: https://github.com/rust-lang/rust/issues/138997

Because the details of the rust abi are unstable, and a naked function must match its stated ABI, this feature gate keeps naked functions with a rustic abi ("Rust", "rust-cold", "rust-call" and "rust-intrinsic") unstable.

r? ````@traviscross````

compiler/rustc_passes/src/errors.rs

@@ -1197,10 +1197,6 @@ pub(crate) struct UnlabeledCfInWhileCondition<'a> {
     pub cf_type: &'a str,
 }
 
-#[derive(LintDiagnostic)]
-#[diag(passes_undefined_naked_function_abi)]
-pub(crate) struct UndefinedNakedFunctionAbi;
-
 #[derive(Diagnostic)]
 #[diag(passes_no_patterns)]
 pub(crate) struct NoPatterns {