### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Note: I create this bug as I didn't get an answer in another related [issue](https://github.com/localstack/localstack/issues/98#issuecomment-929993979) (#98).

After restarting localstorage, when I do a S3 getObject of a file, it gives me the file with some extra chunk-signature data. Example: 
```json
1e5;chunk-signature=83a45ce7e9db52171538036b946102068a9f2005c53049b23c63515f1c048fbc
{ "test": "this is a test json" }
0;chunk-signature=bd812928970799e2d5d16a86900629155d7d38aba42ed2dcbc7d6559c364671f
```

### Expected Behavior

The behaviour expected is getting the object without the extra chunk-signature data as it breaks parsing the file after.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

In order to easily reproduce this bug, I've created a [repository](https://github.com/herrlegno/localstack-s3-signature-error).

# Steps:
* Create a s3 bucket named: test
* Run 1º test (the one with (Order(1) decorator)
* After the test has successfully passed, restart the localstack container.
* Run only the "extendsS3Object" (Order(2) decorator) test or download the file "test.json" from s3 through awscli.

The file will look like something like this:
```json
19;chunk-signature=f64cba77c6523187a1448fd7bd9cd739ce9d953c951af6fe34ac787b8b8f60d6
{"foo":"bar"}
0;chunk-signature=fcc672670aab469d7e23cd6eeea9cb5639feca2f065510bcfb77f057bb391c9b
```


### Environment

```markdown
- OS: Pengwin WSL (but also tried in a native ubuntu 20.10)
- LocalStack: latest
- AWS Java S3 Client: 1.11.73
```


### Anything else?

_No response_
for notif in notifs:
                send_notification_for_subscriber(
                    notif,
                    bucket_name,
                    object_path,
                    version_id,
                    api_method,
                    action,
                    event_name,
                    headers,
                )
def send_notification_for_subscriber(
    notif, bucket_name, object_path, version_id, api_method, action, event_name, headers
):
    bucket_name = normalize_bucket_name(bucket_name)
    if not event_type_matches(notif["Event"], action, api_method) or not filter_rules_match(
        notif.get("Filter"), object_path
    ):
        return
    key = urlparse.unquote(object_path.replace("//", "/"))[1:]
    s3_client = aws_stack.connect_to_service("s3")
    object_data = {}
    try:
        object_data = s3_client.head_object(Bucket=bucket_name, Key=key)
    except botocore.exceptions.ClientError:
        pass
    
    message = get_event_message(
        event_name=event_name,
        bucket_name=bucket_name,