MPP: Do not report ACTUAL_WITHOUT_EXPECT if compatibility is null for all modules

This fixes diagnostic tests

compiler/frontend/src/org/jetbrains/kotlin/resolve/checkers/ExpectedActualDeclarationChecker.kt

@@ -117,13 +117,10 @@ object ExpectedActualDeclarationChecker : DeclarationChecker {
         // So yet we are using own module in compiler context and common module in IDE context.
         val commonOrOwnModules = descriptor.module.expectedByModules.ifEmpty { listOf(descriptor.module) }
         val compatibility = commonOrOwnModules
-            .asSequence()
-            .fold(LinkedHashMap<Compatibility, List<MemberDescriptor>>()) { resultMap, commonModule ->
-                val currentMap = ExpectedActualResolver.findExpectedForActual(descriptor, commonModule)
-                if (currentMap != null) {
-                    resultMap.putAll(currentMap)
-                }
-                resultMap
+            .mapNotNull { ExpectedActualResolver.findExpectedForActual(descriptor, it) }
+            .ifEmpty { return }
+            .fold(LinkedHashMap<Compatibility, List<MemberDescriptor>>()) { resultMap, partialMap ->
+                resultMap.apply { putAll(partialMap) }
             }
 
         val hasActualModifier = descriptor.isActual && reportOn.hasActualModifier()