Minor. Merge multiplatformTypeRefinement testdata with multiplatform testdata

idea/testData/multiplatform/multilevelParents/common-1/common-1.kt

@@ -0,0 +1,18 @@
+@file:Suppress("UNUSED_PARAMETER")
+
+package sample
+
+expect interface A {
+    fun common_1_A()
+}
+
+expect interface B : A {
+    fun common_1_B()
+}
+
+fun getB(): B = null!!
+
+class Out<out T>(val value: T)
+
+fun takeOutA_common_1(t: Out<A>) {}
+fun takeOutB_common_1(t: Out<B>) {}