1.34: flat index: Add support for RQ and include cache param

[dirkkul]

flat index: add support for RQ
BQ: add cache param

weaviate/weaviate-python-client#1844

ONLY FOR v6

[bevzzz]

1. flat index: we do not restrict quantization types that can be set for a vector index, bc in client6 quantization is a "vectorizer" parameter and not a "vector index" parameter
2. BQ: already supported
   

   java-client/src/main/java/io/weaviate/client6/v1/api/collections/quantizers/BQ.java

   Line 13 in d4b8aac

   @SerializedName("cache") Boolean cache) implements Quantization {

[dirkkul]

Then only the cache param needs to be added to RQ

[bevzzz]

Done in #496