Stop using the vae_index

[dwwoelfel]

Follow-up to #1326 and prerequisite for #1330

Modifies some of the datalog queries to replace usage of the vae_index with the new vae_uuid_index. Once we're no longer using the vae_index at all, we can drop it and save ourselves some disk space and cpu on the db instance.

Three main changes:

1. Prefer the :vae index over the :av index in attr-pat when both are applicable (i.e. querying a unique ref attr). This saves us converting an entity_id to JSON in a lot of cases--we can just directly compare the entity_id to json_uuid_to_uuid(value), which requires no calculation because it's already in the vae_uuid_index.
2. Update the join-cols to use the json_uuid_to_uuid(value) = entity_id instead of value = to_jsonb(entity_id) for better use of the vae index.
3. Update in-or-eq to use [:json_uuid_to_uuid :value] when it encounters the vae index, instead of using [:to_jsonb :value]

The structure of the symbol map changed. Instead of being a two-element array, it's now a map with some extra details. [0 1] => {:pattern-idx 0 :triples-idx 1, :ctype :a}. I did that so we could pass down whether the value was a ref into the join cols. It also has the benefit of making it easier to write the join-cond-for-or. The ors need to fully qualify the

Minor changes:

1. Renamed :value-blob to just :value. It's no longer needed now that we stopped tracking the :value-uuid and makes the code a bit cleaner.
2. Replaced the :match-0- prefix with just :m. It makes the queries easier to read and it's less data to and from the db.

Did a backtest and didn't find any queries that got faster or slower.

[github-actions]

View Vercel preview at instant-www-js-stop-using-index-jsv.vercel.app.

[stopachka]

Biyutiful!

[dwwoelfel]

I removed the test cases where we compare on attr ids because we never actually compare attr ids to anything.