All tests for TCO moved to box (with diagnostics marked up)

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

@@ -0,0 +1,12 @@
+fun withoutAnnotation(x : Int) : Int {
+    if (x > 0) {
+        return 1 + withoutAnnotation(x - 1)
+    }
+    return 0
+}
+
+fun box(): String {
+    val r = withoutAnnotation(10)
+    if (r == 10) return "OK"
+    return "Fail $r"
+}