Add support for AWS CloudWatch

[ygyg70]

Would be nice to have https://github.com/micrometer-metrics/micrometer/tree/main/implementations/micrometer-registry-cloudwatch as a Quarkus extension

[can-axelspringer]

It would be great to have this as it would useful to utilize this with quarkus amazon lambda extension.

[pschaub]

new link, it's now micrometer-registry-cloudwatch2
https://github.com/micrometer-metrics/micrometer/tree/main/implementations/micrometer-registry-cloudwatch2