### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When passed to SQS, keys of the messages attributes on SNS are renamed from StringValue to Value and DataType to Type.

### Expected Behavior

The keys should not be renamed

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

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

    docker run localstack/localstack

#### Flow
 - Create a SQS Queue
 - Create a SNS Topic
 - Configure a Subscription of the new Topic that sends to the SQS queue (specify a raw delivery at true)
 - Publish a message to SNS Topic with attribute { DataType: "string", StringValue: "anything"}
 - Attributes are no more StringValue but just value. 

(can't provide more, I have issues with my awslocal, I got this issue with the PHP client initially)

### Environment

```markdown
- OS: Docker Desktop for mac
- LocalStack: 1.4
```


### Anything else?

The AWS SNS official documentation : https://docs.aws.amazon.com/sns/latest/api/API_MessageAttributeValue.html


MR for fix is coming
AttributeValue="MessageBody",
        )
        # w
        # n
        subscription_attrs = aws_client.sns.get_subscription_attributes(
            SubscriptionArn=subscription_arn
        )
        snapshot.match("sub-attrs-filter-scope-body", subscription_attrs)
        # w
        with pytest.raises(ClientError) as e:
            aws_client.sns.set_subscription_attributes(
                SubscriptionArn=subscription_arn,
                AttributeName="FilterPolicyScope",
                AttributeValue="RandomValue",
            )
        snapshot.match("sub-attrs-filter-scope-error", e.value.response)
        # w
        aws_client.sns.set_subscription_attributes(
            SubscriptionArn=subscription_arn,
            AttributeName="FilterPolicy",
            AttributeValue=json.dumps({"attr": ["match-this"]}),
        )
        # t
        subscription_attrs = aws_client.sns.get_subscription_attributes(
            SubscriptionArn=subscription_arn
        )
        snapshot.match("sub-attrs-after-setting-policy", subscription_attrs)
    @pytest.mark.aws_validated
    @pytest.mark.skip_snapshot_verify(paths=["$..Attributes.SubscriptionPrincipal"])
    def test_sub_filter_policy_nested_property(