[FEATURE] Add status to aws.rds.db_instance provider

[jonochang]

Feature Description
Add the status of an AWS RDS DB Instance

Example(s)
This seems a bit of an oversight, since we can't get the status of the db instance ie., whether it's running or stopped.

Possible Approaches or Libraries to Consider
I can't seem to find any other way to get db instance status using stackql.

Additional context
n/a

[jeffreyaven]

hey @jonochang thanks for raising this, the AWS Cloud Control API doesn't expose DBInstanceStatus, which seems wrong... we can get this but we would have to go the old school route via the RDS service API, as it is 10 years old and xml based may take a bit longer but will work on this and let you know