Add ssl configuration to driver3

[wyfo]

Inspired by https://github.com/scylladb/kafka-connect-scylladb

[avelanarius]

LGTM.

I'll do a few small stylistic changes myself (around formatting, null != sslConfig.trustStorePath -> sslConfig.trustStorePath != null, etc.) before merging.

[wyfo]

around formatting, null != sslConfig.trustStorePath -> sslConfig.trustStorePath != null

Actually, this code is copy-pasted from https://github.com/scylladb/kafka-connect-scylladb/blob/master/src/main/java/io/connect/scylladb/ScyllaDbSessionFactory.java#L81, so you may want to apply your modification there too 😄

By the way, I had to adapt the code from the sink connector, because it is using org.apache.kafka.connect.errors.ConnectException, which is not available here. So I've replaced it with a simple RuntimeException. Was there a better exception to use here?