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

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

@@ -0,0 +1,9 @@
+tailRecursive fun foo(x: Int) {
+    if (x == 0) return
+    return (foo(x - 1))
+}
+
+fun box(): String {
+    foo(1000000)
+    return "OK"
+}