(opensearch): We should ship an es requests provider

### Description

When you use es with cdk, you propably want to have something like an es requests provider (custom resource, that can handle opensearch api requests).

Thinking of a improved version of

https://github.com/aws-samples/amazon-elasticsearch-service-with-cognito/blob/master/functions/es-requests/es-requests.js

### Use Case

Allow deployment of opensearch api objects via cdk

### Proposed Solution

Implement a custom resource

### Other information

_No response_

### Acknowledge

- [X] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

Start by reading the linked example at functions/es-requests/es-requests.js to understand the proposed request provider. Define what the CDK custom resource must support for deploying OpenSearch API objects, then verify that those objects can be deployed through the resulting provider.

Written by the indexing model from the issue text.