fix: Ignore invalid miri tests

The tests used `insta`, and miri doesn't like filesystems

quantinuum-hugr/src/hugr/views/tests.rs

@@ -65,11 +65,11 @@ fn node_connections(
 ///
 /// The first parameter `test_name` is required due to insta and rstest limitations.
 /// See https://github.com/la10736/rstest/issues/183
-#[cfg_attr(miri, ignore)] // Opening files is not supported in (isolated) miri
 #[rstest]
 #[case::dfg("dot_dfg", sample_hugr().0)]
 #[case::cfg("dot_cfg", crate::builder::test::simple_cfg_hugr())]
 #[case::empty_dfg("dot_empty_dfg", crate::builder::test::simple_dfg_hugr())]
+#[cfg_attr(miri, ignore)] // Opening files is not supported in (isolated) miri
 fn dot_string(#[case] test_name: &str, #[case] h: Hugr) {
     insta::assert_yaml_snapshot!(test_name, h.dot_string());
 }
@@ -78,11 +78,11 @@ fn dot_string(#[case] test_name: &str, #[case] h: Hugr) {
 ///
 /// The first parameter `test_name` is required due to insta and rstest limitations.
 /// See https://github.com/la10736/rstest/issues/183
-#[cfg_attr(miri, ignore)] // Opening files is not supported in (isolated) miri
 #[rstest]
 #[case::dfg("mmd_dfg", sample_hugr().0)]
 #[case::cfg("mmd_cfg", crate::builder::test::simple_cfg_hugr())]
 #[case::empty_dfg("mmd_empty_dfg", crate::builder::test::simple_dfg_hugr())]
+#[cfg_attr(miri, ignore)] // Opening files is not supported in (isolated) miri
 fn mermaid_string(#[case] test_name: &str, #[case] h: Hugr) {
     insta::assert_snapshot!(test_name, h.mermaid_string());
 }