Minor: merge HierarchicalExpectActualMatchingTests into MultiplatformHighlightingTests

idea/testData/multiplatform/differentKindsOfDependencies/a-js/js.kt

@@ -0,0 +1,8 @@
+actual class A
+
+// Error: ACTUAL_WITHOUT_EXPECT, becuase we shouldn't see expects through usual dependencies
+actual class <!ACTUAL_WITHOUT_EXPECT("Actual class 'B'", "")!>B<!>
+
+// OK: though we can't actualize B, we can see it and use it.
+fun useB(<!UNUSED_PARAMETER("b")!>b<!>: B) {
+}