[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/basics/k42000_1.kt

@@ -0,0 +1,37 @@
+// WITH_STDLIB
+import kotlin.test.*
+
+fun box(): String {
+    assertTrue(Reproducer().repro() > 0)
+
+    return "OK"
+}
+
+// Based on https://youtrack.jetbrains.com/issue/KT-42000#focus=Comments-27-4404934.0-0
+
+val Int.isEven get() = this % 2 == 0
+
+inline operator fun <reified T : Number> T.plus(other: T): T = when (T::class) {
+    Double::class -> (this as Double) + (other as Double)
+    Int::class -> (this as Int) + (other as Int)
+    Long::class -> (this as Long) + (other as Long)
+    else -> TODO()
+} as T
+
+inline fun <reified T : Number> Collection<T>.median(): Double {
+    val sorted = this.sortedBy {
+        it.toDouble()
+    }
+
+    return if (size.isEven || size == 1) {
+        sorted[size / 2]
+    } else {
+        sorted[size / 2] + sorted[size / 2 + 1]
+    }.toDouble()
+}
+
+class Reproducer {
+    private var someListOfLongs = mutableListOf<Long>(1L)
+
+    fun repro() = someListOfLongs.median()
+}