### 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.
# put 
        _key = "key-by-hostname"
        aws_client.s3.put_(Bucket=s3_bucket, Key=_key, Body="something")
        aws_client.s3.put_bucket_cors(
            Bucket=s3_bucket,
            CORSConfiguration={
                "CORSRules": [
                    {
                        "AllowedMethods": ["GET", "PUT", "POST"],
                        "AllowedOrigins": ["*"],
                        "ExposeHeaders": ["ETag", "x-amz-version-id"],
                    }
                ]
            },
        )
        bucket_cors_res = aws_client.s3.get_bucket_cors(Bucket=s3_bucket)
        snapshot.match("bucket-cors-response", bucket_cors_res)
        # get 
        url = aws_client.s3.generate_presigned_url(
            "get_", Params={"Bucket": s3_bucket, "Key": _key}
        )
        # need 
        # as C
        response = .get(url, verify=False, headers={"Origin": "http://localhost"})
        assert response.headers["Access-Control-Expose-Headers"] == "ETag, x-amz-version-id"
        assert response.headers["Access-Control-Allow-Methods"] == "GET, PUT, POST"
        assert (
            response.headers["Access-Control-Allow-Origin"] == "*"
        )  # retu