Use new APIs to dynamically allocate the erofs-shrinker.
Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
CC: Gao Xiang <xiang@xxxxxxxxxx>
CC: Chao Yu <chao@xxxxxxxxxx>
CC: Yue Hu <huyue2@xxxxxxxxxxx>
CC: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
CC: linux-erofs@xxxxxxxxxxxxxxxx