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

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

@@ -0,0 +1,11 @@
+tailRecursive fun foo(x: Int) {
+    return if (x > 0) {
+        (foo(x - 1))
+    }
+    else Unit.VALUE
+}
+
+fun box(): String {
+    foo(1000000)
+    return "OK"
+}