Combine get_interactions for drugs and genes

[jsstevenson]

I'm sort of surprised there's no graphql endpoint that can search on both at once, but I guess I'm not sure how exactly it would work (union or intersection?). Given that, we should just split this thing into separate methods, since it's really doing two separate things.

[jsstevenson]

Also, both should return the same structure of object IMO

[jsstevenson]

They should also return some stuff about InteractionTypes.

[jsstevenson]

In this commit, we changed the drugs query to do a left anchored search on names -- I think for autocomplete reasons? However, this means that if you eg use the get_interactions() method here and just search for "b" you will get like a hundred different drugs.

It might be smart to change the name of the field in the drugs query to a special one for the left anchored search and keep names as an exact match. Really, though, we should just be able to search for interactions by drug/gene directly, so it might be better to focus on that.

[github-actions]

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