Add regression for catch type mention extraction

Author: Copilot

csharp/ql/test/library-tests/regressions/Program.cs

@@ -50,19 +50,6 @@ class C : I<int>, I<string, string>, I<string>
     }
 }
 
-class CatchTypeMentions
-{
-    void F()
-    {
-        try
-        {
-        }
-        catch (Exception)
-        {
-        }
-    }
-}
-
 class NameOfMethodGroups
 {
     int MethodGroup() => 0;
@@ -207,3 +194,16 @@ class C3<T> : C2<C4<T>> { }
 class C4<T> : C2<C3<T>> { }
 
 class C5 : C4<C5> { }
+
+class CatchTypeMentions
+{
+    void F()
+    {
+        try
+        {
+        }
+        catch (Exception)
+        {
+        }
+    }
+}

csharp/ql/test/library-tests/regressions/TypeMentions.expected

@@ -100,3 +100,5 @@
 | Program.cs:194:21:194:21 | T |
 | Program.cs:196:12:196:17 | C4<C5> |
 | Program.cs:196:15:196:16 | C5 |
+| Program.cs:200:5:200:8 | Void |
+| Program.cs:205:16:205:24 | Exception |