Migration: header->expect & impl->actual in IDEA test data

idea/testData/multiModuleLineMarker/fromCommonToJvmHeader/common/common.kt

@@ -1,7 +1,7 @@
-header class <lineMarker>Header</lineMarker> {
+expect class <lineMarker>Header</lineMarker> {
     fun foo(): Int
 }
 
-header fun <lineMarker>foo</lineMarker>(arg: Int): String
+expect fun <lineMarker>foo</lineMarker>(arg: Int): String
 
-header val <lineMarker>flag</lineMarker>: Boolean
+expect val <lineMarker>flag</lineMarker>: Boolean

idea/testData/multiModuleLineMarker/fromCommonToJvmHeader/jvm/jvm.kt

@@ -1,11 +1,11 @@
 // !CHECK_HIGHLIGHTING
 
-impl class Header {
-    impl fun foo() = 42
+actual class Header {
+    actual fun foo() = 42
 }
 
-impl fun foo(arg: Int) = arg.toString()
+actual fun foo(arg: Int) = arg.toString()
 
-impl val flag = true
+actual val flag = true