Missing metrics for object store `put_multipart`

[ShiKaiWi]

Describe This Problem

The metric for the write throughput of object put_multipart is missing.

Proposal

Any AsyncWrite trait object is returned by the object store's put_multipart, based on which the metric about the throughput is not a trival thing to add. A new adapter for counting the number of put bytes implementing AsyncWrite is needed.

Additional Context

No response