AWS::OSIS::Pipeline - [BUG] - Ref does not return resource name

### Name of the resource

AWS::OSIS::Pipeline

### Resource Name

_No response_

### Issue Description

`Ref` function does not return the resource name

### Expected Behavior

`Ref` should return the resource name

### Observed Behavior

`Ref` returns the ARN

### Test Cases

```yaml
Resources:
OpenSearchPipeline:
Type: AWS::OSIS::Pipeline
Properties:
PipelineName: "my-opensearch-pipeline"
...

Outputs:
OpenSearchPipeline:
Description: OpenSearch Pipeline Ref
Value: !Ref OpenSearchPipeline

OpenSearchPipelineArn:
Description: OpenSearch Pipeline ARN
Value: !GetAtt OpenSearchPipeline.PipelineArn
```

### Other Details

_No response_

Start with the AWS::OSIS::Pipeline resource behavior and the YAML test case in this issue, comparing !Ref with !GetAtt PipelineArn. Confirm the CloudFormation resource specification for Ref and the expected resource name, then verify that Ref returns the PipelineName while PipelineArn remains available through GetAtt.

Written by the indexing model from the issue text.