Add a failing YJIT bootstrap test for argument delegation

Author: byroot

bootstraptest/test_yjit.rb

@@ -4754,6 +4754,18 @@ def entry(define)
   entry(true)
 }
 
+assert_equal ':ok', %q{
+  def ok
+    :ok
+  end
+
+  def delegator(...)
+    ok(...)
+  end
+
+  delegator
+}
+
 assert_equal '[:ok, :ok, :ok]', %q{
   def identity(x) = x
   def foo(x, _) = x