Fix check for instance for types with compatible upper bounds

#KT-5246 Fixed

compiler/testData/diagnostics/tests/cast/IsWithCycleUpperBounds.kt

@@ -0,0 +1,14 @@
+// check that there is no SOE on checking for instance
+interface Visitor<T>
+interface Acceptor<T>
+
+class Word : Acceptor<Visitor<Word>>
+
+class V : Visitor<Word>
+
+class S<T : Acceptor<U>, U : Visitor<T>>(val visitor: U, val acceptor: T) {
+    fun test() {
+        visitor is V
+        acceptor is Word
+    }
+}