IDE perf tests for K/N: Produce duplicated *.kt files on demand

idea/testData/perfTest/native/HelloWorld/src/main/HelloMain.kt

@@ -1,3 +1,5 @@
+@file:Suppress("PackageDirectoryMismatch")
+package perfTestPackage1 // this package is mandatory
 
 fun main(args: Array<String>) {
     println("Hello World!")

idea/testData/perfTest/native/HelloWorld/src/main/HelloMain2.kt

@@ -1,4 +0,0 @@
-
-fun main(args: Array<String>) {
-    println("Hello World!")
-}

idea/testData/perfTest/native/HelloWorld/src/main/HelloMain3.kt

@@ -1,4 +0,0 @@
-
-fun main(args: Array<String>) {
-    println("Hello World!")
-}

idea/testData/perfTest/native/HelloWorld/src/test/HelloTest.kt

@@ -1,3 +1,6 @@
+@file:Suppress("PackageDirectoryMismatch")
+package perfTestPackage1 // this package is mandatory
+
 import kotlin.test.Test
 import kotlin.test.assertTrue
 

idea/testData/perfTest/native/HelloWorld/src/test/HelloTest2.kt

@@ -1,11 +0,0 @@
-import kotlin.test.Test
-import kotlin.test.assertTrue
-
-private const val GREETING = "Hello, Kotlin/Native!"
-
-class HelloTest2 {
-    @Test
-    fun testHello() {
-        assertTrue("Kotlin/Native" in GREETING)
-    }
-}

idea/testData/perfTest/native/HelloWorld/src/test/HelloTest3.kt

@@ -1,11 +0,0 @@
-import kotlin.test.Test
-import kotlin.test.assertTrue
-
-private const val GREETING = "Hello, Kotlin/Native!"
-
-class HelloTest3 {
-    @Test
-    fun testHello() {
-        assertTrue("Kotlin/Native" in GREETING)
-    }
-}