refactor and new metrics

• Refactor ListClusterFaults metrics
• Added metrics for ListISCSISession

Implement ListDrives

refactor list_drives metrics (#9)

* refactor list_drives metrics

v0.4.4: Implement getclusterfullthreshold (#7)

• Added metrics for GetClusterFullThreshold API call

v0.4.3: Implement GetClusterStats (#6)

• Added stats for getclusterstats metrics

v0.4.2

• Fix bug for missing Bucket0 for qos_target_utilization metrics

v0.4.1

• Added label for volume_name and node_name

v0.4.0

Available metrics are

• Volume QoS stats
• Volume stats
• Node stats
• Fault stats
• Cluster stats

v0.3.6

Update release.yaml