Merge pull request #38924 from cyx1231st/wip-seastar-onode-tree-onode_t

crimson/onode-staged-tree: implement an extensive Value framework

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

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

diff --cc src/crimson/os/seastore/onode_manager/staged-fltree/node.h
Simple merge

diff --cc src/crimson/os/seastore/onode_manager/staged-fltree/node_extent_manager.h
Simple merge

diff --cc src/crimson/os/seastore/onode_manager/staged-fltree/node_impl.h
Simple merge

diff --cc src/crimson/os/seastore/onode_manager/staged-fltree/tree.h
Simple merge