Minor. Merge multiplatformTypeRefinement testdata with multiplatform testdata

idea/testData/multiplatform/qualifiedReceiver/common/common.kt

@@ -0,0 +1,18 @@
+@file:Suppress("NO_ACTUAL_FOR_EXPECT")
+
+package foo
+
+expect interface A {
+    fun commonFun()
+    val b: B
+    fun bFun(): B
+}
+
+expect interface B {
+    fun commonFunB()
+}
+
+class Common {
+    val a: A get() = null!!
+    fun aFun(): A = null!!
+}