Merge pull request #67567 from xxhdx1985126/wip-seastore-objectdatahandler-zero-bug

crimson/os/seastore/object_data_handler: avoid reserving zero-length regions

Reviewed-by: Matan Breizman <mbreizma@redhat.com>
Reviewed-by: Samuel Just <sjust@redhat.com>

diff --cc src/crimson/os/seastore/object_data_handler.cc
Simple merge