[NI] Introduce type depth in CS calculator to avoid SOE

compiler/testData/codegen/box/regressions/supertypeDepth.kt

@@ -0,0 +1,18 @@
+class A : FirstOwner<Holder<A>>
+class B : SecondOwner<Holder<B>>
+
+interface FirstOwner<T : StubElement<*>> : SecondOwner<T>
+interface SecondOwner<T : StubElement<*>>
+
+interface StubElement<T>
+
+interface Holder<T> : StubElement<T>
+
+fun test(a: A?, b: B) {
+    val c = a ?: b
+}
+
+fun box(): String {
+    test(A(), B())
+    return "OK"
+}