### Description
Hi,
There is mandatory parameter iam_role_name parameter for GlueJobOperator/GlueJobHook.
It adds additional step of translating it to the arn, which needs  connectivity to the global iam AWS endpoint (no privatelink availabale).
For private setups it needs opening connectivity + proxy configuration to make it working.  
It would be great to have also possibility to just pass directly iam_role_arn and avoid this additional step.
### Use case/motivation

Role assignation does not need external connectivity, possibility of adding arn instead of the name.

### Related issues

_No response_

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""
        Get list of Jobs.
        .. seealso::
            - :external+boto3:py:meth:`Glue.Client.get_jobs`
        """
        return self.conn.get_jobs()
    def get_iam_execution_role(self) -> dict:
        """Get IAM Role for job execution."""
        try:
            iam_client = self.get_session(region_name=self.region_name).client(
                "iam", endpoint_url=self.conn_config.endpoint_url, config=self.config, verify=self.verify
            )
            glue_execution_role = iam_client.get_role(RoleName=self.role_name)
            self.log.info("Iam Role Name: %s", self.role_name)
            return glue_execution_role
        except Exception as general_error:
            self.log.error("Failed to create aws glue job, error: %s", general_error)
            raise
    def initialize_job(