Minor. Merge multiplatformTypeRefinement testdata with multiplatform testdata

idea/testData/multiplatform/constructorsOfExpect/common/common.kt

@@ -0,0 +1,3 @@
+expect class A {
+    fun commonMember()
+}

idea/testData/multiplatform/constructorsOfExpect/dependencies.txt

@@ -0,0 +1,4 @@
+MODULE common { platform=[JVM, JS, Native] }
+MODULE jvm { platform=[JVM] }
+
+jvm -> common { kind=DEPENDS_ON }

idea/testData/multiplatform/constructorsOfExpect/jvm/jvm.kt

@@ -0,0 +1,10 @@
+actual class A {
+    actual fun commonMember() { }
+
+    fun platformMember() { }
+}
+
+fun test() {
+    A().commonMember()
+    A().platformMember()
+}