fix: handle concurrent lockers with multiple optimizations (#10640)

- select lockers which are non-local and online to have
  affinity towards remote servers for lock contention

- optimize lock retry interval to avoid sending too many
  messages during lock contention, reduces average CPU
  usage as well

- if bucket is not set, when deleteObject fails make sure
  setPutObjHeaders() honors lifecycle only if bucket name
  is set.

- fix top locks to list out always the oldest lockers always,
  avoid getting bogged down into map's unordered nature.

cmd/xl-storage.go

@@ -661,21 +661,7 @@ func (s *xlStorage) ListVols(context.Context) (volsInfo []VolInfo, err error) {
 		atomic.AddInt32(&s.activeIOCount, -1)
 	}()
 
-	volsInfo, err = listVols(s.diskPath)
-	if err != nil {
-		if isSysErrIO(err) {
-			return nil, errFaultyDisk
-		}
-		return nil, err
-	}
-	for i, vol := range volsInfo {
-		volInfo := VolInfo{
-			Name:    vol.Name,
-			Created: vol.Created,
-		}
-		volsInfo[i] = volInfo
-	}
-	return volsInfo, nil
+	return listVols(s.diskPath)
 }
 
 // List all the volumes from diskPath.