### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

copyObject and putObject (and perhaps other requests) requests are accepted and do not return an error when an SSE KMS key is specified. 

### Expected Behavior

The error which should be returned is KMS.NotFoundException.

### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    Localstack testcontainers 

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

   Call copyObject/putObject via latest version using AWS SDK V2 and specific a ssekmsKeyId.

```java
final var copyObjectRequestBuilder =
        CopyObjectRequest.builder()
            .serverSideEncryption(ServerSideEncryption.AWS_KMS)
            .ssekmsKeyId("NON-EXISTENT KMS KEY")
            .sourceBucket(sourceBucketName)
            .sourceKey(sourceKey)
            .destinationBucket(destinationBucket)
            .destinationKey(destinationKey);
final var copyObjectResponse = sourceRegionS3Client.copyObject(copyObjectRequest); // Error should be thrown here but localstack does not return an error
```

### Environment

```markdown
- OS: MacOS 13.0
- LocalStack: Latest (v1.2.0)
```


### Anything else?

_No response_
http_servers = []
    def _create_http_endpoint(
        raw_message_delivery: bool = False,
    ) -> Tuple[str, str, str, HTTPServer]:
        server = HTTPServer()
        server.start()
        http_servers.append(server)
        server.expect_request("/sns-endpoint").respond_with_data(status=200)
        endpoint_url = server.url_for("/sns-endpoint")
        wait_for_port_open(endpoint_url)
        topic_arn = sns_create_topic()["TopicArn"]
        subscription = sns_subscription(TopicArn=topic_arn, Protocol="http", Endpoint=endpoint_url)
        subscription_arn = subscription["SubscriptionArn"]
        delivery_policy = {
            "healthyRetryPolicy": {