Merge pull request #62540 from jbaergen-do/btree2-backport-upstream-squid

squid: Backport the hybrid_btree2 allocator and prereqs

Reviewed-by: Igor Fedotov <igor.fedotov@croit.io>

diff --cc src/common/options/global.yaml.in
Simple merge

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

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