CUMULUS-2688: New Granule endpoint GET /:collectionId/:granuleId

[npauzenga]

Summary:

Addresses CUMULUS-2688: Develop amazing new feature

Changes

This is the endpoint update to allow users to fetch granules by their unique columns (collection_cumulus_id + granule_id).

The new endpoint is /:collectionId/:granuleName where collectionId is in the name___version format, NOT the collection_cumulus_id. It's done this way because we don't appear to index collection_cumulus_id in ES or return it from our LIST endpoint. This means that users/the dashboard aren't likely to have that ID from previous requests.

It would be nicer to use collection_cumulus_id/granule_id as the endpoint to save a Collection query but that seems like it would be less useful.

These changes are only adding the endpoint, not using the new functions elsewhere. I'd like to do those in a separate PR and maybe a separate ticket for some.

What's left:

• Update granule DELETE, PUT endpoints to also require collectionId (likely need new endpoints like we have here)
• Update granule bulk update logic to use new functions
• Update CMR logic to use a collectionId

PR Checklist

• Update CHANGELOG
• Unit tests
• Ad-hoc testing - Deploy changes and test manually
• Integration tests

[Jkovarik]

Great work! Just a couple of comments/considerations. Let me know what you think, and as always I'm available to pair/discuss anytime.

[npauzenga]

Thanks @Jkovarik! I replied to your comments and updated where appropriate.

[Jkovarik]

Thanks for addressing my feedback 👍🏻