src/mgr/OSDMonitor.cc Add command ceph osd pool availability-status

```
ceph osd pool availability-status
```
outputs:

`POOL`
`UPTIME`
`DOWNTIME`
`NUMFAILURES`
`MTBF`
`MTTR`
`SCORE`
`AVAILABLE`

Fixes: https://tracker.ceph.com/issues/67777

Signed-off-by: Kamoltat <[email protected]>

Author: kamoltat

src/mon/MonCommands.h

@@ -1243,6 +1243,9 @@ COMMAND("osd pool stretch unset "
 		"name=min_size,type=CephInt,range=0 ",
 		"unset the stretch mode for the pool",
 		"osd", "rw")
+COMMAND("osd pool availability-status", \
+        "obtain availability stats from all pools", \
+        "osd", "r")
 COMMAND("osd utilization",
 	"get basic pg distribution stats",
 	"osd", "r")