AWS 2-5: Evaluate Stitching Multiple TDX Hydro Datasets into One Vector Tile Dataset

[rajadain]

Following the successful evaluation of TDX Hydro as Vector Tiles in #3623, and pending their full ingest in https://github.com/WikiWatershed/global-hydrography/issues/2, create a script to ingest multiple source .gpkg files into one vector tile dataset.

This can be demonstrated with as little as two .gpkg files, for example these two:

• TDX_streamnet_7020024600_01.gpkg
• TDX_streamnet_7020038340_01.gpkg

On quick inspection it seems like most boundaries are clean without intersections:

although there is an occasional overlap:

[rajadain]

No longer needed since we're using Windshaft rendered raster tiles as of #3644