Merge pull request #65763 from gardran/wip-gardran-kill-get-omap-keys

os: eliminate ObjectStore::get_omap_keys method

diff --cc src/os/FuseStore.cc
Simple merge

diff --cc src/os/ObjectStore.h
Simple merge

diff --cc src/os/bluestore/BlueStore.cc
Simple merge

diff --cc src/os/bluestore/BlueStore.h
Simple merge

diff --cc src/os/kstore/KStore.cc
Simple merge

diff --cc src/os/kstore/KStore.h
Simple merge

diff --cc src/os/memstore/MemStore.cc
Simple merge

diff --cc src/os/memstore/MemStore.h
Simple merge

diff --cc src/test/objectstore/ObjectStoreImitator.h
Simple merge

diff --cc src/test/objectstore/store_test.cc
Simple merge