Support Cost Allocation Tags to PutMetricData

Support Cost Allocation Tags to PutMetricData

## Describe the Feature
aws-sdk-java-v2 has a feature to send AWS CloudWatch Custom Metrics with CloudWatchMetricPublisher.

## Is your Feature Request related to a problem?
### Inter component problem
When I noticed an increased cost of PutMetricData on checking Cost Explorer, I cannot investigate what causes the cost.
What I can now is just ask "[at]here Are there people who know why PutMetricData" in our Slack...

### Between stages
When we have multiple stages like `production`, `staging`, and `development`, we need to grouping metrics count by stage. If we have tags we can use it but we don't have a way to distinguish the metrics between stages.

## Proposed Solution
aws-sdk-java-v2 supports Cost Allocation Tags on sending PutMetricData

## Describe alternatives you've considered

Output namespace of metrics in aws billing data.

- [ ] I may be able to implement this feature request

Inizia individuando i punti di ingresso CloudWatchMetricPublisher e PutMetricData in aws-sdk-java-v2, quindi confronta il supporto esistente del Java SDK con il comportamento proposto per Cost Allocation Tags. Il lavoro dovrebbe essere considerato completato quando sarà possibile inviare metriche personalizzate con i tag richiesti e il comportamento sarà coperto dai test pertinenti, anche se l’issue non indica file o test specifici.

Scritto dal modello di indicizzazione a partire dal testo della issue.