Line Marking: Fix search of overriding methods in platform modules

#KT-19212 Fixed

idea/testData/multiModuleLineMarker/suspendImplInPlatformModules/js/js.kt

@@ -0,0 +1,7 @@
+// !CHECK_HIGHLIGHTING
+
+class KJs : I {
+    suspend override fun foo(s: String) {
+
+    }
+}