Collect additional metrics for harbor

[chlins]

Harbor has supported expose the metrics of harbor, currently existed metrics can be found here, but we also got many requirement issues from the community to ask for adding other metrics, so let's discuss in this place for new metrics, feel free to leave your comments.

[yuangeqingian]

1: Replication task details such as registry name, trigger type, execution status, execution total count
2: Replication total count,
3: Replication execution total count, succeed/failure/stop count