Fix generic signature for KFunctionN types on JVM

#KT-15473 Fixed

compiler/testData/compileJavaAgainstKotlin/callableReference/GenericSignature.java

@@ -0,0 +1,10 @@
+package test;
+
+import kotlin.reflect.KFunction;
+
+class Bar extends Foo {
+    @Override
+    public KFunction<Request> request() {
+        return null;
+    }
+}