### 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_
message1 = ses_client.send_email(
            Source=email,
            Message={
                "Subject": {
                    "Data": "A_SUBJECT",
                },
                "Body": {
                    "Text": {
                        "Data": "A_MESSAGE",
                    },
                    "Html": {
                        "Data": "A_HTML",
                    },
                },
            },
            Destination={
                "ToAddresses": ["success@example.com"],
            },
        )
        message1_id = message1["MessageId"]
        
        contents1 = _read_message_from_filesystem(message1_id)
        assert contents1["Id"] == message1_id
        assert contents1["Timestamp"]
        assert contents1["Region"]
        assert contents1["Source"] == email
        assert contents1["Destination"] == {"ToAddresses": ["success@example.com"]}
        assert contents1["Subject"] == "A_SUBJECT"
        assert contents1["Body"] == {"text_part": "A_MESSAGE", "html_part": "A_HTML"}