Is your feature request related to a problem? Please describe.
No.
Describe the solution you'd like
I've set up CloudWatch as a datasource and would like to query the Bedrock/Guardrails namespace. I'm pretty unfamiliar with this repo but this seem to be missing from this const: https://github.com/grafana/grafana-aws-sdk/blob/8ea6d3e96a1d6ff0577471b398cbb1eb801bf2e4/pkg/cloudWatchConsts/metrics.go#L3C5-L3C24.
Describe alternatives you've considered
No alternative considered.
Additional context
When using CloudWatch as a datasource, I don’t have the option to pick the Bedrock/Guardrails namespace. It is not available in the picker nor queryable
 
