Per region DD metrics/logs

For clusters with HA (aka multi-region) configuration, it's hard to reason about Data Distributor as most of the metrics (in status) and logs report stats for all of the regions together. `TeamCollectionInfo` is reported per region, we could do the same probably. Although, instead of having a boolean of `primary`, it's good to have the region name given in the configuration.

Start by tracing Data Distributor's status metrics and logs for HA or multi-region clusters, then compare their reporting with the per-region TeamCollectionInfo path. Identify where the configured region name is available and define completion as region-specific metrics and logs that label each region by name rather than aggregating all regions or using only a primary boolean.

Written by the indexing model from the issue text.