Don't report any errors in lower_intrinsics. They should have been typecked before.

compiler/rustc_borrowck/src/session_diagnostics.rs

@@ -452,3 +452,10 @@ pub(crate) enum TypeNoCopy<'a, 'tcx> {
     #[note(borrowck_ty_no_impl_copy)]
     Note { is_partial_move: bool, ty: Ty<'tcx>, place: &'a str },
 }
+
+#[derive(Diagnostic)]
+#[diag(borrowck_simd_shuffle_last_const)]
+pub(crate) struct SimdShuffleLastConst {
+    #[primary_span]
+    pub span: Span,
+}