Option to provide custom exporter configuration

[maxmil7]

Hi splunk team,

We have a usecase where we would like to use different exporters depending on the environment. Eg. console exporter in local, Jaeger exporter in production, InMemory exporter for testing etc.

Currently, this module accepts a configuration object for instrumentations.
Is it possible to provide a similar option for exporter config as well. Depending on the env, we can pass the required configuration.

Thanks