Properly calculate outermost parent class for sam wrapper

#KT-22906 Fixed

compiler/testData/codegen/box/sam/kt22906.kt

@@ -0,0 +1,26 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+// FILE: kt22906_1.kt
+package test
+
+class C {
+    fun startTemplate(): String {
+        val y = object {
+            fun foo(): String {
+                val job = { "OK" }
+                return java.util.concurrent.Callable(job).call()
+            }
+
+        }
+        return y.foo()
+    }
+}
+
+// FILE: kt22906_2.kt
+import test.*
+
+fun box(): String {
+    if (java.lang.Class.forName("test.C\$sam\$java_util_concurrent_Callable\$0") == null) return "fail: can't find sam wrapper"
+
+    return C().startTemplate()
+}