converting date time for topics

[mailmahee]

The options for supporting locale, timezone and timestamp temporal pattern are not supported currently in Scylla sink, maybe we can address them at a future point in time.

topic.topic_name.codec.locale=en_US
topic.topic_name.codec.timeZone=UTC
topic.topic_name.codec.timestamp=CQL_TIMESTAMP

[tarzanek]

as per https://docs.scylladb.com/getting-started/types/#working-with-timestamps
scylla supports mainly https://en.wikipedia.org/wiki/ISO_8601
so this should be the default codec (and hardcoded of course up until scylla supports more)