Update vector support to work with arbitrary (and variable-sized) subtypes #512
Description
The dsbulk version of a set of tickets for the native drivers of which JAVA-3143 is the clearest (and most appropriate) example. The short version is that we're currently using Java driver version 4.17.0 (as of this writing) which supports the vectors provided by DataStax Astra. Apache Cassandra has subsequently added vectors as well and it's impl is more flexible, supporting arbitrary vector subtypes, some of which are of varying lengths.
dsbulk should be updated to support Apache Cassandra vectors as well.
Note that this will require an update to the Java driver in order to include the features provided in JAVA-3143 (which was included in 4.19.0). #506 is already aiming to address that problem... the goal of this ticket is to perform the remaining work to make vectors work as expected.