Move on impl position test to proper directory

tests/ui/diagnostic_namespace/on_unimplemented/on_impl_trait.rs

@@ -1,5 +1,6 @@
-// used to ICE, see <https://github.com/rust-lang/rust/issues/130627>
-// Instead it should just ignore the diagnostic attribute
+//! used to ICE, see <https://github.com/rust-lang/rust/issues/130627>
+//! Instead it should just ignore the diagnostic attribute
+
 #![feature(trait_alias)]
 
 trait Test {}

tests/ui/diagnostic_namespace/on_unimplemented/on_impl_trait.stderr

@@ -1,5 +1,5 @@
 warning: `#[diagnostic::on_unimplemented]` can only be applied to trait definitions
-  --> $DIR/on_impl_trait.rs:7:1
+  --> $DIR/on_impl_trait.rs:8:1
    |
 LL | #[diagnostic::on_unimplemented(message = "blah", label = "blah", note = "blah")]
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -7,7 +7,7 @@ LL | #[diagnostic::on_unimplemented(message = "blah", label = "blah", note = "bl
    = note: `#[warn(unknown_or_malformed_diagnostic_attributes)]` on by default
 
 error[E0277]: the trait bound `{integer}: Alias` is not satisfied
-  --> $DIR/on_impl_trait.rs:15:9
+  --> $DIR/on_impl_trait.rs:16:9
    |
 LL |     foo(&1);
    |     --- ^^ the trait `Test` is not implemented for `{integer}`
@@ -15,13 +15,13 @@ LL |     foo(&1);
    |     required by a bound introduced by this call
    |
 help: this trait has no implementations, consider adding one
-  --> $DIR/on_impl_trait.rs:5:1
+  --> $DIR/on_impl_trait.rs:6:1
    |
 LL | trait Test {}
    | ^^^^^^^^^^
    = note: required for `{integer}` to implement `Alias`
 note: required by a bound in `foo`
-  --> $DIR/on_impl_trait.rs:12:11
+  --> $DIR/on_impl_trait.rs:13:11
    |
 LL | fn foo<T: Alias>(v: &T) {}
    |           ^^^^^ required by this bound in `foo`