Provide better error message when accessing non-JSON API table

[jeffreyscarpenter]

A user reported the following:

We’re working on a chatbot using a db loaded w/ wikipedia data. The table has already been loaded w/ the embeddings but when running a find using my TS client I always get a [{"message":"Vector search is not enabled for the collection pages","errorCode":"VECTOR_SEARCH_NOT_SUPPORTED"}] .

After investigation it was determined that the underlying table for this collection was created via CQL. While the table did have a vector column, it was not created via JSON API, which is the real root issue. We need a more correct error message in this case that addresses the larger problem.