DAOS-18673 pool: Initialize sp_recov_lock

[liw]

Looks like ds_pool.sp_recov_lock is not initialized via ABT_rwlock_create. This led to the following ABT error,

#5  in ds_cont_tgt_open at src/container/srv_target.c:1954
#6  in cont_iv_ent_update at src/container/container_iv.c:646
#7  in update_iv_value at src/engine/server_iv.c:280
#8  in iv_on_update_internal at src/engine/server_iv.c:490
#9  in ivc_on_update at src/engine/server_iv.c:530
#10 in crt_iv_update_internal at src/cart/crt_iv.c:3438
#11 in crt_iv_update at src/cart/crt_iv.c:3559
#12 in iv_op_internal at src/engine/server_iv.c:1080
#13 in _iv_op at src/engine/server_iv.c:1129
#14 in iv_op at src/engine/server_iv.c:1241
#15 in ds_iv_update at src/engine/server_iv.c:1287
#16 in cont_iv_update at src/container/container_iv.c:867
#17 in cont_iv_capability_update at src/container/container_iv.c:1245
#18 in cont_open at src/container/srv_container.c:2821
#19 in cont_op_with_cont at src/container/srv_container.c:5613
#20 in cont_op_with_svc at src/container/srv_container.c:5845
#21 in ds_cont_op_handler at src/container/srv_container.c:6064
#22 in ds_cont_op_handler_v8 at src/container/srv_container.c:6108
#23 in crt_handle_rpc at src/cart/crt_rpc.c:1747

where the line was

#5  in ds_cont_tgt_open at src/container/srv_target.c:1954
1954            DABT_RWLOCK_RDLOCK(pool->sp_recov_lock);

Steps for the author:

• Commit message follows the guidelines.
• Appropriate Features or Test-tag pragmas were used.
• Appropriate Functional Test Stages were run.
• At least two positive code reviews including at least one code owner from each category referenced in the PR.
• Testing is complete. If necessary, forced-landing label added and a reason added in a comment.

After all prior steps are complete:

• Gatekeeper requested (daos-gatekeeper added as a reviewer).

[github-actions]

Ticket title is 'daos container query: ERROR: daos_engine:1 [rwlock.c:150] ABT_rwlock_rdlock: 23'
Status is 'Open'
https://daosio.atlassian.net/browse/DAOS-18673