Handle constructor usage for actual class as usage of expect class

#KT-25498 Fixed

idea/testData/multiModuleFindUsages/findCommonSuperclass/common/common.kt

@@ -0,0 +1,5 @@
+// PSI_ELEMENT: org.jetbrains.kotlin.psi.KtClass
+// OPTIONS: usages, expected
+
+expect open class O<caret>Class(i: Int)
+expect class Inheritor : OClass

idea/testData/multiModuleFindUsages/findCommonSuperclass/common/common.results.txt

@@ -0,0 +1,2 @@
+[common.kt] Supertype 5 expect class Inheritor : OClass
+[jvm.kt] Supertype 2 actual class Inheritor : OClass(42)

idea/testData/multiModuleFindUsages/findCommonSuperclass/jvm/jvm.kt

@@ -0,0 +1,2 @@
+actual open class OClass actual constructor(i: Int)
+actual class Inheritor : OClass(42)