Relates: #7708

Add the following new resources to the emr service in the aws plugin:

• Studio Session Mappings: https://awscli.amazonaws.com/v2/documentation/api/latest/reference/emr/list-studio-session-mappings.html
• Studios: https://awscli.amazonaws.com/v2/documentation/api/latest/reference/emr/list-studios.html