Migration to actual/expect: quick-fix CreateActualFix with tests

idea/testData/multiModuleQuickFix/class/header/header.kt

@@ -1,4 +1,4 @@
-// "Create header class implementation for platform JVM" "true"
+// "Create actual class for platform JVM" "true"
 
 header class <caret>My {
     fun foo(param: String): Int

idea/testData/multiModuleQuickFix/class/header/header.kt.after

@@ -1,4 +1,4 @@
-// "Create header class implementation for platform JVM" "true"
+// "Create actual class for platform JVM" "true"
 
 header class My {
     fun foo(param: String): Int

idea/testData/multiModuleQuickFix/class/jvm/My.kt.after

@@ -1,22 +1,22 @@
 // My: to be implemented
-impl class My {
-    impl fun foo(param: String): Int {
+actual class My {
+    actual fun foo(param: String): Int {
         TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 
-    impl fun String.bar(y: Double): Boolean {
+    actual fun String.bar(y: Double): Boolean {
         TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 
-    impl fun baz() {}
+    actual fun baz() {}
 
     constructor(flag: Boolean) {
         TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 
-    impl val isGood: Boolean
+    actual val isGood: Boolean
         get() = TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
-    impl var status: Int
+    actual var status: Int
         get() = TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
         set(value) {}