FIR light builder: use type reference node as FirTypeRef source

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/converter/DeclarationsConverter.kt

@@ -1712,7 +1712,8 @@ class DeclarationsConverter(
         if (identifier == null)
             return buildErrorTypeRef { diagnostic = ConeSimpleDiagnostic("Incomplete user type", DiagnosticKind.Syntax) }
 
-        val theSource = userType.toFirSourceElement()
+        // Note: we take TYPE_REFERENCE, not USER_TYPE, as the source (to be consistent with RawFirBuilder)
+        val theSource = tree.getParent(userType)!!.toFirSourceElement()
         val qualifierPart = FirQualifierPartImpl(
             identifier.nameAsSafeName(),
             FirTypeArgumentListImpl(theSource).apply {