Kotlin: Enable java/misnamed-type query

We used to get alerts for the class around a local function, a lambda,
or a function reference, which we give name "". Now those are marked as
compiler-generated, and the query ignores compiler-generated types.

java/ql/lib/semmle/code/java/Element.qll

@@ -71,6 +71,8 @@ class Element extends @element, Top {
       i = 11 and result = "Forwarder for a Kotlin class inheriting an interface default method"
       or
       i = 12 and result = "Argument for enum constructor call"
+      or
+      i = 13 and result = "The class around a local function, a lambda, or a function reference"
     )
   }
 }

java/ql/src/Advisory/Naming/NamingConventionsRefTypes.ql

@@ -12,7 +12,8 @@ import java
 
 from RefType t
 where
-  t.getFile().isJavaSourceFile() and
+  t.fromSource() and
   not t instanceof AnonymousClass and
+  not t.isCompilerGenerated() and
   not t.getName().substring(0, 1).toUpperCase() = t.getName().substring(0, 1)
 select t, "Class and interface names should start in uppercase."

java/ql/src/change-notes/2022-11-25-NamingConventionsRefTypes-kotlin.md

@@ -0,0 +1,4 @@
+---
+category: minorAnalysis
+---
+* The query `java/misnamed-type` is now enabled for Kotlin.

java/ql/test/kotlin/query-tests/NamingConventionsRefTypes/NamingConventionsRefTypes.expected

@@ -0,0 +1 @@
+| Test.kt:12:1:12:13 | aaaa | Class and interface names should start in uppercase. |