### 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_
"""
        Moto tries to parse the TagSet and then iterate of it, not checking if it returned something
        Potential to be an easy upstream fix
        """
        try:
            tags: Dict[str, str] = fn(*args, **kwargs)
        except TypeError:
            tags = {}
        return tags
    @patch(moto_s3_responses.S3Response._cors_from_body)
    def _fix_parsing_cors_rules(fn, *args, **kwargs) -> List[Dict]:
        """
        Fix parsing of CORS Rules from moto, you can set empty origin in AWS. Replace None by an empty string
        """
        cors_rules = fn(*args, **kwargs)
        for rule in cors_rules:
            if rule["AllowedOrigin"] is None:
                rule["AllowedOrigin"] = ""
        return cors_rules
    @patch(moto_s3_responses.S3Response.is_delete_keys)
    def s3_response_is_delete_keys(fn, self):