feature: add ping for kafka

[ArtARTs36]

Reason for This PR

At the moment, the pipeline starts even with a non-working connection to kafka. For example, I can specify the wrong broker and get no error. I would like to see an error if the connection to kafka is not working.

Description of Changes

I've added a Ping{timeout} structure to the kafka configuration. I did it with a structure, because in the future it may be necessary to supplement the ping or do it more often.

As a user i will get an error:

service-queue-1  | handle_serve_command: Function call error:
service-queue-1  |        serve error from the plugin *jobs.Plugin stopping execution, error: jobs_plugin_serve: kafka_run: ping kafka was failed: unable to dial: dial tcp 172.20.0.5:9093: connect: connection refused

This behavior will be optional to maintain backwards compatibility.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[rustatian]

Thanks for the PR @ArtARTs36 👍🏻
A few things needs to be done as well:

1. Docs PR: https://github.com/roadrunner-server/roadrunner-docs
2. End-To-End tests PR: https://github.com/roadrunner-server/rr-e2e-tests. To test this feature, you can use replace to your local folder.
   Here is the docker-compose: link and example on how to run test: link

[ArtARTs36]

Docs here: roadrunner-server/roadrunner-docs#146

[ArtARTs36]

@rustatian, e2e tests roadrunner-server/rr-e2e-tests#385, check please

[rustatian]

Good job 👍🏻 Last few fixes 😃

[rustatian]

LGTM 👍🏻

[rustatian]

Thank you @ArtARTs36 👍🏻

[ArtARTs36]

@rustatian, thanks for your time and review ❤️

Maybe it's worth creating an issue for ping by interval? I think it will be very helpful.

[rustatian]

You're very welcome @ArtARTs36 👍🏻

Sure, feature requests are super welcome 👍🏻