Use codegen box tests for tail calls as diagnostic tests too

compiler/testData/codegen/box/functions/tailRecursion/insideElvis.kt

@@ -1,8 +1,10 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
 tailRecursive fun test(counter : Int, a : Any) : Int? {
     if (counter < 0) return null
     if (counter == 0) return 777
 
-    return test(-1, "no tail") ?: test(-2, "no tail") ?: test(counter - 1, "tail")
+    return <!NON_TAIL_RECURSIVE_CALL!>test<!>(-1, "no tail") ?: <!NON_TAIL_RECURSIVE_CALL!>test<!>(-2, "no tail") ?: test(counter - 1, "tail")
 }
 
 fun box() : String =