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

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

@@ -0,0 +1,8 @@
+<!NO_TAIL_CALLS_FOUND!>tailRecursive fun noTails()<!> {
+    // nothing here
+}
+
+fun box(): String {
+    noTails()
+    return "OK"
+}