Add API name to AWS::ApiGateway::RestApi return values

### Name of the resource

AWS::ApiGateway::RestApi

### Resource name

_No response_

### Description

Please add the API name to the the return values of the [AWS::ApiGateway::RestApi](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-apigateway-restapi.html) resource. Currently, the [return values](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-apigateway-restapi.html#aws-resource-apigateway-restapi-return-values) are limited to `RestApiId` and `RootResourceId`.

Our specific use case relates to CloudWatch Metrics, where `ApiName` is a [required dimension for REST APIs](https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-metrics-and-dimensions.html). For example, we'd like to be able to create a CloudWatch Alarm to monitor for 5xx errors as follows:

```yaml
AWSTemplateFormatVersion: 2010-09-09

Resources:

RestApi:
Type: AWS::ApiGateway::RestApi
Properties:
Body:
openapi: 3.0.3

Alarm:
Type: AWS::CloudWatch::Alarm
Properties:
Namespace: AWS/ApiGateway
MetricName: 5XXError
Dimensions:
- Name: ApiName
Value: !GetAtt RestApi.Name
Statistic: Sum
ComparisonOperator: GreaterThanThreshold
EvaluationPeriods: 1
Period: 60
Threshold: 0
```

### Other Details

_No response_

Start with the AWS::ApiGateway::RestApi return-values documentation and the linked CloudWatch API Gateway metrics and dimensions guidance. Trace how this repository records coverage requests for CloudFormation resources; done means the resource exposes its API name through GetAtt so the CloudWatch Alarm example can use it as the ApiName dimension.

Written by the indexing model from the issue text.