[AWS::Scheduler::Schedule] - [Enhancement] - Implement `GetAtt` for the `Resource Name`

### Name of the resource

AWS::Scheduler::Schedule

### Description

Currently `AWS::Scheduler::Schedule` only supports `Ref` to get the `Resource Name`. Implementing this would be great.

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-scheduler-schedule.html

Related to https://github.com/aws-cloudformation/cloudformation-coverage-roadmap/issues/68

Start by reading the AWS::Scheduler::Schedule documentation linked in the issue and the related coverage-roadmap issue. Identify where this resource's Ref and attribute behavior is tracked, then verify that GetAtt exposes the Resource Name and that the documented behavior is covered by the project's checks or tests.

Written by the indexing model from the issue text.