### 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_
)
from localstack.constants import TEST_AWS_SECRET_ACCESS_KEY
from localstack.http import Resource
from localstack.services.internal import DeprecatedResource, get_internal_apis
from localstack.services.moto import call_moto
from localstack.services.plugins import ServiceLifecycleHook
from localstack.services.ses.models import SentEmail, SentEmailBody
from localstack.utils.aws import arns, aws_stack
from localstack.utils.files import mkdir
from localstack.utils.strings import long_uid, to_str
from localstack.utils.time import timestamp, timestamp_millis
if TYPE_CHECKING:
    from mypy_boto3_sns import SNSClient
LOGGER = logging.getLogger(__name__)
EMAILS: Dict[MessageId, Dict[str, Any]] = {}
EMAILS_ENDPOINT = "/_aws/ses"
_EMAILS_ENDPOINT_REGISTERED = False
def save_for_retrospection(sent_email: SentEmail):
    """
    Save a message for retrospection.
    The contents of the email is saved to filesystem. It can also be accessed via a service endpoint.
    """
    message_id = sent_email["Id"]
    ses_dir = os.path.join(config.dirs.data or config.dirs.tmp, "ses")
    mkdir(ses_dir)
    path = os.path.join(ses_dir, message_id + ".json")
    if not sent_email.get("Timestamp"):
        sent_email["Timestamp"] = timestamp()
    EMAILS[message_id] = sent_email
    def _serialize(obj):