Feature Overview (aka. Goal Summary)  

Customers have strong demand and valid use-case to have entirely customised role names for ROSA cluster operator-role names. 

Instead of only having a prefix, we should offer a custom suffix, or more effectively a fully freeform role-name for operator roles. 

This scenario would be common with customers that would not use a prefix in the role naming, or customers that use infra-as-code tools such as Terraform or the AWS CLI to directly create AWS IAM resources.

Requirements (aka. Acceptance Criteria):

• allow customers to provide ARNs of operator roles that are free-form named (not named as we expect them already)
• all ROSA clients and APIs are functional with this capability
• documentation is provided for achieving this outcome

Questions to Answer (Optional):

Would this break our current ROSA UI without adapting it?

Documentation Considerations

Documentation will need to be updated to indicate that the operator role names can be free-form and how that could be achieved.