Merge pull request #48350 from athanatos/sjust/wip-57739

crimson/.../replicated_request,logmissing_request: retain reference to req

Reviewed-by: Chunmei Liu <chunmei.liu@intel.com>
Reviewed-by: Radoslaw Zarzynski <rzarzynski@redhat.com>

Merge pull request #48308 from cyx1231st/wip-seastore-offset

crimson/os/seastore: introduce (64-8)-bit signed device_off_t and 32-bit signed segment_off_t

Reviewed-by: Myoungwon Oh <myoungwon.oh@samsung.com>
Reviewed-by: Samuel Just <sjust@redhat.com>
Reviewed-by: Liu-Chunmei <chunmei.liu@intel.com>

crimson/.../replicated_request,logmissing_request: retain reference to req

Otherwise, operator<< and dump_detail would need to accessing req after
the call to handle_rep_op.

Fixes: https://tracker.ceph.com/issues/57739
Signed-off-by: Samuel Just <sjust@redhat.com>