[v9.0 only] Implement metrics to track the progress and potential issues of viewless timeseries upgrade/downgrade from serverStatus.

Examples:

• Amount of timeseries views.
• Amount of viewless timeseries collections.
• Number of collections that were successfully converted to viewless format.
• Number of collections that failed to convert to viewless format (bucket inconsistencies).
• Indicate how long each timeseries conversion is taking.