The component is already deprecated in EDOT components. We should mark it as deprecated explicitly within its own docs.

Example:

• https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/7a90970aace[…]f308feb788973254388de624779/exporter/sapmexporter/metadata.yaml
• https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/7a90970aace7bf308feb788973254388de624779/exporter/sapmexporter/README.md

We should also consider to log a warning when it's enabled.