Consolidate Integration Guides I vs. II

## About
On both pages listed below, we are referring to [Integration Tutorials I](https://cratedb.com/docs/guide/integrate/index.html#integrate) vs. [Integration Tutorials II](https://community.cratedb.com/t/overview-of-cratedb-integration-tutorials/1015). It needs to be consolidated.

## References
- https://cratedb.com/docs/guide/home/
- https://cratedb-guide--98.org.readthedocs.build/migrate/rockset/

Compare the Integration Tutorials I page with the Community overview linked in the issue, then inspect the guide home and Rockset migration reference for related wording. Consolidate the two tutorial references so readers find one consistent integration-guide structure, and verify that the affected documentation links and labels no longer distinguish the guides inconsistently.

Written by the indexing model from the issue text.