os/bluestore: add bluestore_prefer_deferred_size_hdd/ssd to tracked keys
To make these two keys can be changed online:
./bin/ceph tell osd.* injectargs "--bluestore_prefer_deferred_size_hdd 0"
osd.0: bluestore_prefer_deferred_size_hdd = '0' (not observed, change may require restart)
osd.1: bluestore_prefer_deferred_size_hdd = '0' (not observed, change may require restart)
osd.2: bluestore_prefer_deferred_size_hdd = '0' (not observed, change may require restart)
Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
(cherry picked from commit
cd1225634cf4d20e485f7c30d5a0438febc7ddcc)