RGWHTTP::process does not accept optional_yield yet

ceph-14.2.1-fix_rgw_sync.patch

@@ -80,7 +80,7 @@ diff -uNr ceph-14.2.1/src/test/rgw/test_http_manager.cc ceph-14.2.1-fix_rgw_sync
 +  const auto url = std::string{"http://127.0.0.1:"} + std::to_string(acceptor.local_endpoint().port());
 +
 +  RGWHTTPClient client{g_ceph_context, "GET", url};
-+  EXPECT_EQ(-EAGAIN, RGWHTTP::process(&client, null_yield));
++  EXPECT_EQ(-EAGAIN, RGWHTTP::process(&client));
 +
 +  server.join();
 +}