Describe the enhancement:

Make it possible for CEL to issue API requests to AWS that are signed using credentials that are read from the host environment. It should not be required to provide a static aws access key / secret key in the config.

Describe a specific use case for the enhancement or feature:

To be able to sign API requests like

https://github.com/elastic/integrations/blob/0c425904e85e8acc92a9c6132ddfa378927c90b7/packages/aws/data_stream/securityhub_insights/agent/stream/httpjson.yml.hbs#L28

when deploying integrations inside of AWS where service account credentials are available on the host. For example, when deploying Agent in EKS we use EKS Pod Identity association which manages a token inside of the container that can be use to authenticate requests.