Expose integrationsupport and internal

[pragmaticivan]

Summary

Trying to write some tests for a custom middleware and found these package would be beneficial to have around for testing:

"github.com/newrelic/go-agent/v3/internal"
"github.com/newrelic/go-agent/v3/internal/integrationsupport"

Desired Behaviour

I would like to use things like NewBasicTestApp and app.ExpectTxnMetrics in my tests.

If not possible to export it, possibly export it as a new module.

[MateSousa]

can i work on this ?

[shackra]

can i work on this ?

we don't know, can you? 🤔