API Gateway: Too Many Requests on API creation

Hello,

When creating an API that contains a lot of endpoints, we reach the API Gateway limit on resource creation and get the error

```
Too Many Requests (Service: ApiGateway, Status Code: 429, ...
```

The limits :
https://docs.amazonaws.cn/en_us/batch/latest/userguide/service_limits.html

### Reproduction Steps

Create a REST API with a lot of resources.

### What did you expect to happen?

I expected that CDK will consider this and have a 'sleep' between calls if necessary.

Right now I'm just commenting some of the nested stack that contains my ressources and unccoment them in batch.

Linked to this I think :
https://github.com/aws-cloudformation/cloudformation-coverage-roadmap/issues/589

### What actually happened?

Got the 429 error

### Environment

- **CDK CLI Version :** 1.109.0 (build c647e38)
- **Node.js Version:** v12.18.1

This is :bug: Bug Report

Start with the REST API reproduction described in the issue and review the linked CloudFormation coverage-roadmap issue 589 for related context. The payload names no source file or test entry point; done should mean creating an API with many resources no longer fails with the reported API Gateway 429 error.

Written by the indexing model from the issue text.