### 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_
self, context: RequestContext, template_name: TemplateName
    ) -> DeleteTemplateResponse:
        backend = get_ses_backend(context)
        if template_name in backend.templates:
            del backend.templates[template_name]
        return DeleteTemplateResponse()
    @handler("GetIdentityVerificationAttributes")
    def get_identity_verification_attributes(
        self, context: RequestContext, identities: IdentityList
    ) -> GetIdentityVerificationAttributesResponse:
        attributes: VerificationAttributes = {}
        for identity in identities:
            if "@" in identity:
                attributes[identity] = IdentityVerificationAttributes(
                    VerificationStatus=VerificationStatus.Success,
                )
            else:
                attributes[identity] = IdentityVerificationAttributes(
                    VerificationStatus=VerificationStatus.Success,
                    VerificationToken=long_uid(),
                )
        return GetIdentityVerificationAttributesResponse(
            VerificationAttributes=attributes,
        )
    @handler("SendEmail")
    def send_email(