KT-13111: lambda --> reference support methods called via this now

idea/testData/intentions/convertLambdaToReference/memberViaThis.kt

@@ -0,0 +1,4 @@
+class Owner(val z: Int) {
+    fun foo(y: Int) = y + z
+    val x = { y: Int -><caret> this.foo(y) }
+}

idea/testData/intentions/convertLambdaToReference/memberViaThis.kt.after

@@ -0,0 +1,4 @@
+class Owner(val z: Int) {
+    fun foo(y: Int) = y + z
+    val x = this::foo
+}