feat: add delay option to CW exporter

[tmeijn]

PR Description

• Add delay option to prometheus.exporter.cloudwatch component to delay scraping of metrics to account for CloudWatch ingestion latency.

• Export yace_.* metrics from the underlying YACE Exporter to prometheus.exporter.cloudwatch.

Which issue(s) this PR fixes

Fixes #3929, Partially #398

Notes to the Reviewer

Warning

This is vibe coded, so it might not be the best. However testing a local build it works as I'd expect.

Validation of yace_.* metrics:

delay option present in alloy ui:

CloudWatch vs Prometheus

PR Checklist

• CHANGELOG.md updated
• Documentation added
• Tests updated
• Config converters updated

[kalleep]

Changes looks mostly fine to me but I left one question, also I can see that @kgeckhart was involved with the original pr so maybe he have more context around this

[tmeijn]

Hey @kalleep, @kgeckhart anything I can do to help this move forwards?

[kgeckhart]

Let's ship this and I'll open an issue upstream to add a 2 minute delay for 1 minute periods. We know from running our hosted product that 1 minute periods require a 2 minute delay but YACE doesn't do this for you and you must know to do it yourself instead. The referenced alloy issue regarding metrics being too low is for 1 minute periods as well.

We still need to expose delay because there are other use cases where adding delay can be necessary but they are the exception and in most cases the default roundingPeriod logic works as expected.