`saltcloud.cloud.Cloud.get_provider()` is no longer necessary.
Since we now enforce a specific data layout, `get_configured_providers()` is now simplified.
Removed `saltcloud.cloud.Cloud.get_providers()`.

There no more need for the above method since we iterate through our mapped configuration data and act accordingly.
We now also output the data queries like `<provider-alias> -> <provider-driver> -> <queried-data>`.