### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When requesting a  Complete operation at the end of a multi part upload, the parts have to be sorted in ascending order of part number.
AWS S3 issues an error if it is not the case. localstack does not generate such error (although, its log issues warnings)/

### Expected Behavior

Complete should generate an error

### How are you starting LocalStack?

With the `localstack` script

### Steps To Reproduce

localstack start

Buggy software extract (simplified)
```golang
	wg := errgroup.Group{}
	for i := 0; i < 3; i++ {
		wg.Go(func() error {
			rd, err := os.Open(source)
			if err != nil {
				return err
			}
			return u.Upload(rd, i, 10*_cMB)  // uploads and stores for part i
		})
	}
	err :=  wg.Wait()
if err != nil {
...
}
err = u.Complete()
// as using i inside the routines, all the four parts will have the same value 3
```

### Environment

```markdown
- OS:Ubuntu 20.04
- LocalStack: latest pro
```


### Anything else?

_No response_
return f"{_endpoint_url(region, localstack_host)}/{bucket_name}"
def _website_bucket_url(bucket_name: str):
    # TODO depending on region the syntax of the website vary (dot vs dash before region)
    if os.environ.get("TEST_TARGET") == "AWS_CLOUD":
        region = config.AWS_REGION_US_EAST_1
        return f"http://{bucket_name}.s3-website-{region}.amazonaws.com"
    return _bucket_url_vhost(bucket_name, localstack_host=constants.S3_STATIC_WEBSITE_HOSTNAME)
def _bucket_url_vhost(bucket_name: str, region: str = "", localstack_host: str = None) -> str:
    if not region:
        region = config.AWS_REGION_US_EAST_1
    if os.environ.get("TEST_TARGET") == "AWS_CLOUD":
        if region == "us-east-1":
            return f"https://{bucket_name}.s3.amazonaws.com"
        else:
            return f"https://{bucket_name}.s3.{region}.amazonaws.com"
    host = localstack_host or (
        f"s3.{region}.{LOCALHOST_HOSTNAME}" if region != "us-east-1" else S3_VIRTUAL_HOSTNAME
    )
    s3_edge_url = config.get_edge_url(localstack_hostname=host)
    # TODO might add the region here
    return s3_edge_url.replace(f"://{host}", f"://{bucket_name}.{host}")
def _generate_presigned_url(
    client: "S3Client", params: dict, expires: int, client_method: str = "get_"
) -> str:
    return client.generate_presigned_url(
        client_method,
        Params=params,
        ExpiresIn=expires,
    )
def _make_url_invalid(url_prefix: str, _key: str, url: str) -> str: