Reformat dataset configs, add missing collections

[smohiudd]

The PR includes:

• new dataset-config directory which includes the json config that can be used with the dataset/publish API endpoint. The list of collections is incomplete.
• recreation of all collections jsons from the staging STAC api. This updates old collection metadata and reconciles veda-data with the staging STAC api so there are no missing collections files.

[anayeaye]

A couple related operations comments (not necessarily for this PR):

If we want to publish these directly for our staging stack, my only concert about this is making sure we don't wipe out the collection summaries. Is that something you could carry over if it existed with the reformat.py script? It might also be nice to keep that in git as a support script for future efforts.

And/or we could make a support script to load the collection and call the update dashboard summaries function for all of these except the externally hosted vector collections. EDIT: here's the method to call the summaries and extents updates.