apiviewgo includes exported methods of inaccessible types

For example, when run on azidentity at https://github.com/Azure/azure-sdk-for-go/commit/423de74c610bd584529ec5a1a0ef26f47cd48b90, apiviewgo includes `func (*managedIdentityClient) CloseIdleConnections()` in its output. `managedIdentityClient` shouldn't appear in API View because it can't be accessed by application code.

Start by reproducing apiviewgo against the azidentity commit 423de74c610bd584529ec5a1a0ef26f47cd48b90 and inspect how exported methods are selected for API View. Done means methods such as managedIdentityClient.CloseIdleConnections are excluded when their receiver type is inaccessible to application code.

Written by the indexing model from the issue text.