If you have only 1 data source, when clicking on "Browse Data", skip the Database and go to the schemas (if > 1) or directly to the tables

**Is your feature request related to a problem? Please describe.**
The current state adds more friction to first-time data people. Also, it's arguably unnecessary

**Describe the solution you'd like**
If you have only 1 data source, when clicking on "Browse Data", we can skip the Database and go to the schemas (if there is more than 1 schema) or directly to the tables for faster exploration.

**Describe alternatives you've considered**
None

**How important is this feature to you?**
Requested by a customer that has as customers with no data experience.

**Additional context**
None

Start at the Browse Data navigation entry point and trace how the single data source, schema count, and table destination are selected. Confirm the behavior for one data source with one versus multiple schemas, and verify that multiple data sources still retain the Database step.

Written by the indexing model from the issue text.