Add support for `FFI_TableProviderFactory`

[davisp]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

As a user I want to be able to extend datafusion-python with third party libraries. This support exists for many things such as table providers, user defined functions, and others. This issue is to expose the new FFI_TableProviderFactory in datafusion-ffi.

Describe the solution you'd like
Add support to SessionConfig to add TableProviderFactory support. Once registered it should allow for ctx.sql("CREATE EXTERNAL TABLE ...").

Describe alternatives you've considered

None

Additional context

This is needed to allow third party libraries to expose CREATE EXTERNAL TABLE DDL support.