### 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_
assert "RawData" not in contents1
        
        raw_message_data = f"From: {email}\nTo: recipient@example.com\nSubject: test\n\nThis is the message body.\n\n"
        message2 = ses_client.send_raw_email(RawMessage={"Data": raw_message_data})
        message2_id = message2["MessageId"]
        
        contents2 = _read_message_from_filesystem(message2_id)
        assert contents2["Id"] == message2_id
        assert contents2["Timestamp"]
        assert contents2["Region"]
        assert contents2["Source"] == email
        assert contents2["RawData"] == raw_message_data
        assert "Destination" not in contents2
        assert "Subject" not in contents2
        assert "Body" not in contents2
        
        emails_url = config.get_edge_url() + EMAILS_ENDPOINT
        api_contents = requests.get(emails_url).json()
        api_contents = {msg["Id"]: msg for msg in api_contents["messages"]}
        assert len(api_contents) >= 1
        assert message1_id in api_contents
        assert message2_id in api_contents
        assert api_contents[message1_id] == contents1
        assert api_contents[message2_id] == contents2
        
        emails_url = config.get_edge_url() + EMAILS_ENDPOINT + "?email=none@example.com"
        assert len(requests.get(emails_url).json()["messages"]) == 0
        emails_url = config.get_edge_url() + EMAILS_ENDPOINT + f"?email={email}"
        assert len(requests.get(emails_url).json()["messages"]) == 2
    def test_send_templated_email_can_retrospect(self, ses_client, create_template):