Merge pull request #62895 from cyx1231st/wip-seastore-omap-link-init

crimson/os/seastore/omap_manager: simplify maybe_init from tolerating duplicated calls

Reviewed-by: Xuehan Xu <xuxuehan@qianxin.com>

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

diff --cc src/crimson/os/seastore/cached_extent.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