Connection options for writes are not applied

With a default example (e.g. https://git.picodata.io/core/examples/-/blob/master/picodata-jdbc-spark-example/src/main/scala/PicodataJDBCSparkDataSourceTLSExample.scala) it can be reproduced that some options, that are specified for writes, are not applied and propagated to the driver (e.g. prepareThreshold, reWriteBatchedInserts). This significantly affects writing performance.

See parent issue picodata-jdbc#19 (closed) for details.