POC: Separate provisioning initialization to other data collection

[wbreza]

This PR adds a new function CollectData() to the provisioning provider interface.

The goal here is to separate the provisioning provider initialization from other aspects of data collection for the provider.

This enables:

1. Initialization can focus on core provider validation and only prompt for core required data
2. Additional data collection for provisioning can happen closer to the actual provisioning process

Output would look like the following