Implement facet id filter on AOTF endpoint

[jdhayhurst]

As a user I want to be able to filter the AOTF results based on one or more facets.

Using facet ids from https://github.com/opentargets/issues/issues/3276 the user should be able to filter the AOTF results with these ids.

The backend will resolve these facet ids to a set of target or disease ids and use that to filter the AOTF results.

Background

see https://github.com/opentargets/issues/issues/3239

Tasks

• [x] add facet ID (Array) filter to AOTF endpoint
• [x] implement a resolver for facetIds -> target/diseaseIds
• [x] apply the target/diseaseIDs on AOTF

Acceptance tests

How do we know the task is complete?

1. when I use the AOTF API endpoint, I'm able to filter the results by one or more facetId(s)

[jdhayhurst]

Added facetFilters argument to the associatedTargets and associatedDiseases endpoints, which takes an array of facet IDs that can be obtained from the facets API from opentargets/issue#3276. The facet Ids are subsequently resolved to target/disease IDs (i.e. BIDS) to expand the BID set for filtering. So the BID filtering is applied with an "OR" operator.