### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The Complete Multipart Upload operation generates the **InternalError** error for non-existing uploads.

### Expected Behavior

The Complete Multipart Upload operation generates the **NoSuchUpload** error for non-existing uploads.

### How are you starting LocalStack?

With a `docker run` command

### Steps To Reproduce

    docker run -it --rm -p 4566:4566 localstack/localstack

    aws s3api create-bucket --bucket test --endpoint-url http://localhost:4566 --create-bucket-configuration LocationConstraint=us-west-2

    aws s3api complete-multipart-upload --bucket test --endpoint-url http://localhost:4566 --key test --upload-id test

### Environment

```markdown
- OS: Windows 11
- LocalStack: latest
```


### Anything else?

The Abort Multipart Upload operation works correctly in LocalStack.

The official documentation: https://docs.aws.amazon.com/AmazonS3/latest/API/API_CompleteMultipartUpload.html
Amazon S3 throws the correct **NoSuchUpload** error for both Abort and Complete operations.
response["ETagHeader"] = key.etag
        if response["StatusCode"] == 303:
            
            try:
                redirect = _create_redirect_for_post_request(
                    base_redirect=context.request.form["success_action_redirect"],
                    bucket=bucket,
                    key=key_name,
                    etag=key.etag,
                )
                response["LocationHeader"] = redirect
            except ValueError:
                
                response["StatusCode"] = 204
        response["LocationHeader"] = response.get(
            "LocationHeader", f"{get_full_default_bucket_location(bucket)}{key_name}"
        )
        if bucket in self.get_store().bucket_versioning_status:
            response["VersionId"] = key.version_id
        self._notify(context, key_name=key_name)
        if context.request.form.get("success_action_status") != "201":
            return response
        response["ETag"] = key.etag
        response["Bucket"] = bucket
        response["Key"] = key_name
        response["Location"] = response["LocationHeader"]
        return response
    @handler("GetObjectAttributes", expand=False)
    def get_object_attributes(