Minor: merge HierarchicalExpectActualMatchingTests into MultiplatformHighlightingTests

idea/testData/multiplatform/weaklyIncompatibleActualInIntermediateModule/dependencies.txt

@@ -0,0 +1,6 @@
+MODULE top { platform=[JVM, JS, Native] }
+MODULE middle { platform=[JVM, JS] }
+MODULE bottom { platform=[JVM] }
+
+middle -> top { kind=DEPENDS_ON }
+bottom -> middle { kind=DEPENDS_ON }

idea/testData/multiplatform/weaklyIncompatibleActualInIntermediateModule/middle/middle.kt

@@ -0,0 +1,4 @@
+package sample
+
+actual class <!NO_ACTUAL_CLASS_MEMBER_FOR_EXPECTED_CLASS("A", "      public final expect fun f(): Unit ")!>A<!> {
+}

idea/testData/multiplatform/weaklyIncompatibleActualInIntermediateModule/top/top.kt

@@ -0,0 +1,5 @@
+package sample
+
+expect class A {
+    fun f()
+}