### 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_
templ_list = ses_client.list_templates()["TemplatesMetadata"]
        assert 0 == len(templ_list)
        create_template(Template=TEST_TEMPLATE_ATTRIBUTES)
        templ_list = ses_client.list_templates()["TemplatesMetadata"]
        assert 1 == len(templ_list)
        ses_client.delete_template(TemplateName=TEST_TEMPLATE_ATTRIBUTES["TemplateName"])
        templ_list = ses_client.list_templates()["TemplatesMetadata"]
        assert 0 == len(templ_list)
    def test_get_identity_verification_attributes(self, ses_client):
        domain = "example.com"
        email = f"user-{short_uid()}@example.com"
        test_values = [domain, email]
        response = ses_client.get_identity_verification_attributes(Identities=test_values)[
            "VerificationAttributes"
        ]
        assert 2 == len(response)
        for value in test_values:
            assert "Success" == response[value]["VerificationStatus"]
        assert "VerificationToken" in response[domain]
        assert "VerificationToken" not in response[email]
    def test_send_email_can_retrospect(self, ses_client):
        
        def _read_message_from_filesystem(message_id: str) -> dict:
            """Given a message ID, read the message from filesystem and deserialise it."""
            data_dir = config.dirs.data or config.dirs.tmp
            with open(os.path.join(data_dir, "ses", message_id + ".json"), "r") as f:
                message = f.read()
            return json.loads(message)
        email = f"user-{short_uid()}@example.com"
        ses_client.verify_email_address(EmailAddress=email)