Add compatibility testing with Beats Automation

[brijos]

Is your feature request related to a problem?
In OpenSearch 2.0, OpenSearch broke a compatibility mode setting which allowed Beats to connect to OpenSearch directly. The team implemented a fix.

What solution would you like?
Add automation to the build process to prevent the bug from returning as long as compatibility mode is supported.

What alternatives have you considered?
None

Do you have any additional context?
Agents and Ingestion Tools Documentation.

[VachaShah]

For some options where we can add this automation:

1. In opensearch-clients repo with a script/Github Action.
2. In OpenSearch repo.
3. Create a separate repo for this automation.

I feel adding it in opensearch-clients would be relevant and we can run the tests on a cron schedule. WDYT @saratvemulapalli @dblock @brijos @CEHENKLE?

[CEHENKLE]

I'm leaning towards 1 with an automatic trigger. :)

[saratvemulapalli]

+1 I would prefer with 1.
We ideally dont want to block PRs on OpenSearch with breaking changes in beats and a separate repo just for a simple workflow seems like a lot.