Merge pull request #38290 from athanatos/sjust/wip-transaction-manager-nbd

crimson/seastore: add journaling checksumming and nbd based simple perf tester

Reviewed-by: Yingxin Cheng <yingxin.cheng@intel.com>
Reviewed-by: Kefu Chai <kchai@redhat.com>

diff --cc src/crimson/os/seastore/CMakeLists.txt
Simple merge

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

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

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