out_rdkafka2: add patch for new version of rdkafka

[ttych]

All PR are failing now because of rdkafka gem update.

The current code works with rdkafka 0.12.0,
and in 0.14.0 (there is no 0.13.0), the Rdkafka::Producer implementation has changed,
no more @client and Rdkafka::Producer::Client,
now there is a @native_client and Rdkafka::NativeKafka.

No update on this part of the code between 0.14.0 and 0.15.0.

There is a constraint in the out_rdkafka2, on the Rdkafka::Producer#close, to add a timeout,
which is not part of the standard gem.

I try to update this behavior since following the current way to patch.

Thanks.

[ttych]

I just see #500,
so this is not a safe way to do it this way.

and also, waterdrop encapsulation for rdkafka is just for producer side.

[github-actions]

This PR has been automatically marked as stale because it has been open 90 days with no activity. Remove stale label or comment or this PR will be closed in 30 days

[ashie]

Sorry for my late response, I overlooked this.
It looks good, but need to update for rdkafka-ruby v0.16.

Hey @kenhys, I'm now considering to revert #513 then apply this with some further improvements. In addition, we may need to feedback this timeout patch to upstream to avoid future monkey patching. What do you think about it?

[kenhys]

I'm not sure yet but I agreed with reverting #513 to improve it.

[kenhys]

In this approach, the border case should also follow in CI.

[kenhys]

Reverted #513.

[ashie]

LGTM

[ashie]

Thanks for your contribution! @ttych