[Usage collection] Track deprecation warnings

[TinaHeiligers]

In #82431, we deprecated the legacy logging configuration with the plan to remove it in 8.0.

At the moment we don't actually know how many users removing the system will impact and, ideally, we should have data to back up the decision.

We issue configuration deprecation warnings from core and we could monitor these (for example: set a boolean for if a notice has been issued). That way, we'd build a more generic usage collector that we can use for future configuration deprecations.

[Bamieh]

I have a PR for creating a deprecations service. We should be able to track all the user sepcific deprecations using this service.

We have another issue to track all non default kibana.yml configs. So we might not even need to hook any telemetry into the deprecations service.