[ENG-5493][ENG-5412] more helpful trove responses

[aaxelb]

ENG-5493

• fill in trove/exceptions.py with situation-specific exception classes
• use those specific exceptions thruout trove code
• give an appropriate response when those specific exceptions happen while handling a request (currently always in jsonapi)
• reduce dead links and other errors when browsing the search api
  • allow resolving static vocab terms (including "new" static vocabs skos, foaf, dc, dctype, dcam)
  • display datatypes for literals
• add better search-api tests (with actual search indexes running)
• fix broken next links with field-specific search (ENG-5412)
• code cleanup
  • add trove.trovesearch with modules previously at trove.trovesearch_gathering, share.search.search_params, and share.search.search_response
  • render derived indexcard metadata as rdf literal (except html rendering) -- avoid errors from non-standard "quoted triple" or "quoted graph"
  • remove trove.render.osfmap_jsonld (subsumed by trove.derive.osfmap_json)
  • remove ingest_rdf_vocabs management command (unnecessary with "static vocab" update)
  • rename ...VOCAB to ...THESAURUS (not just a set of terms, but a whole rdf graph describing those terms)
  • remove trove.util.iri_labeler (completely replaced by primitive_rdf.IriShorthand
  • consolidate mediatypes as constants in trove.vocab.mediatypes
  • move all "static vocabs" into trove.vocab.static_vocab
  • add functools.cache to things that need be computed only once

[coveralls]

coverage: 89.878% (+0.3%) from 89.605% when pulling 5c615218b02a321b7105e84dcd44bd12e3d52ed2 on aaxelb:fix/more-helpful-trove-responses into 09c109fc43dea9d66afcdee45c198519d16d7a72 on CenterForOpenScience:develop.