Merge pull request #59572 from xxhdx1985126/wip-67874

crimson/osd/backfill_state: add the object to be pushed in the peer missing set of PeeringState

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

diff --cc src/crimson/osd/backfill_state.cc
Simple merge

diff --cc src/crimson/osd/backfill_state.h
Simple merge

diff --cc src/crimson/osd/pg_recovery.cc
Simple merge

diff --cc src/crimson/osd/pg_recovery.h
Simple merge

diff --cc src/test/crimson/test_backfill.cc
Simple merge