### 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_
return retry(_create_function, retries=3, sleep=4)
    yield _create_lambda_function
    for arn in lambda_arns:
        try:
            lambda_client.delete_function(FunctionName=arn)
        except Exception:
            LOG.debug(f"Unable to delete function {arn=} in cleanup")
@pytest.fixture
def create_lambda_function(
    lambda_client, logs_client, iam_client, wait_until_lambda_ready, lambda_su_role
):
    lambda_arns_and_clients = []
    log_groups = []
    def _create_lambda_function(*args, **kwargs):
        client = kwargs.get("client") or lambda_client
        kwargs["client"] = client
        func_name = kwargs.get("func_name")
        assert func_name
        del kwargs["func_name"]
        if not kwargs.get("role"):
            kwargs["role"] = lambda_su_role
        def _create_function():
            resp = testutil.create_lambda_function(func_name, **kwargs)
            lambda_arns_and_clients.append((resp["CreateFunctionResponse"]["FunctionArn"], client))
            wait_until_lambda_ready(function_name=func_name, client=client)
            log_group_name = f"/aws/lambda/{func_name}"
            log_groups.append(log_group_name)
            return resp