zdb: Dump encrypted write and clone ZIL records

Block pointers are not encrypted in TX_WRITE and TX_CLONE_RANGE
records, so we can dump them, that may be useful for debugging.

Related to #15543.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes #15629