### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Provide an URL where I can delete stored SES emails.
My motivation is to write integration tests much easier, if I could delete the stored emails from the localstack before each test case. 

I use the docker image to run localstack. Mount the `/var/lib/localstack` folder to the host and delete the files from the `tmp/state/ses` is cumbersome because of the file permission issue of docker.

I think the simplest way to achieve the empty SES emails state is to implement a new endpoint in a same way as to the GET /_localstack/ses has been implemented:

**path:** /_localstack/ses
**method:** DELETE

### 🧑‍💻 Implementation

I am not a python developer, but I think one solution is to extend the [SesServiceApiResource](https://github.com/localstack/localstack/blob/590de96b3dd65e349709300b668e70f1f9664e99/localstack/services/ses/provider.py#L121) with an `on_delete` method.

Open question for me is either delete the `/var/lib/localstack/tmp/state/ses` folder or just delete the files of the `ses` folder.
The folder does not exist when the container starts. It is created when the first email received and saved by the service.
I think both solutions have the same performance impact, so the real question is what is preferred by the maintainers.

As I mentioned I am not familiar with python ecosystem but I am happy to help implementing the feature if you accept the request.

### Anything else?

_No response_
filter_source = request.args.get("email")
        messages = []
        for msg in EMAILS.values():
            if filter_source in (msg.get("Source"), None, ""):
                messages.append(msg)
        return {
            "messages": messages,
        }
def register_ses_api_resource():
    """Register the email retrospection endpoint as an internal LocalStack endpoint."""
    
    
    global _EMAILS_ENDPOINT_REGISTERED
    if not _EMAILS_ENDPOINT_REGISTERED:
        ses_service_api_resource = SesServiceApiResource()
        get_internal_apis().add(
            Resource(
                "/_localstack/ses",
                DeprecatedResource(
                    ses_service_api_resource,
                    previous_path="/_localstack/ses",
                    deprecation_version="1.4.0",
                    new_path="/_aws/ses/",
                ),
            )
        )
        from localstack.services.edge import ROUTER
        ROUTER.add(Resource(EMAILS_ENDPOINT, ses_service_api_resource))
        _EMAILS_ENDPOINT_REGISTERED = True
class SesProvider(SesApi, ServiceLifecycleHook):