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

idea/testData/refactoring/safeDeleteMultiModule/byHeaderClassMemberVal/after/Common/src/test/test.kt

@@ -1,6 +1,6 @@
 package test
 
-header class Foo {
+expect class Foo {
 }
 
 fun test(f: Foo) = f.foo

idea/testData/refactoring/safeDeleteMultiModule/byHeaderClassMemberVal/after/JS/src/test/test.kt

@@ -1,6 +1,6 @@
 package test
 
-impl class Foo {
+actual class Foo {
     val foo get() = 1
 }
 

idea/testData/refactoring/safeDeleteMultiModule/byHeaderClassMemberVal/after/JVM/src/test/test.kt

@@ -1,6 +1,6 @@
 package test
 
-impl class Foo {
+actual class Foo {
     val foo get() = 2
 }