Merge pull request #43492 from xxhdx1985126/wip-52894

crimson/os/seastore: set ExtentPlacementManager::allocated_to before rolling segments

Reviewed-by: Chunmei Liu <chunmei.liu@intel.com>
Reviewed-by: Samuel Just <sjust@redhat.com>
Reviewed-by: Yingxin Cheng <yingxin.cheng@intel.com>

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

diff --cc src/crimson/os/seastore/extent_placement_manager.h
Simple merge