[Website]: Feature overview similar to EDOT for APM

[lucabelluccini]

Type of issue

None

What documentation page is affected

https://www.elastic.co/docs/reference/apm-agents/

What happened?

It would be great to build a feature overview matrix as the one of https://www.elastic.co/docs/reference/opentelemetry/edot-sdks/#feature-overview but for APM

Additional info

No response