### 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.
# mimi
        # http
        policy = {
            "Id": "test-s3-bucket-access",
            "Version": "2012-10-17",
            "Statement": [
                {
                    "Sid": "AllowSSLRequestsOnly",
                    "Action": "s3:*",
                    "Effect": "Deny",
                    "Resource": [f"arn:aws:s3:::{s3_bucket}", f"arn:aws:s3:::{s3_bucket}/*"],
                    "Condition": {"Bool": {"aws:SecureTransport": "false"}},
                    "Principal": "*",
                }
            ],
        }
        aws_client.s3.put_bucket_policy(Bucket=s3_bucket, Policy=json.dumps(policy))
        # put 
        content = b"test-content"
        aws_client.s3.put_(Bucket=s3_bucket, Key="test/123", Body=content)
        result = aws_client.s3.get_(Bucket=s3_bucket, Key="test/123")
        received_content = result["Body"].read()
        assert received_content == content
        # enab
        monkeypatch.setattr(s3_constants, "ENABLE_MOTO_BUCKET_POLICY_ENFORCEMENT", True)
        with pytest.raises(ClientError) as exc:
            aws_client.s3.get_(Bucket=s3_bucket, Key="test/123")
        assert exc.value.response["Error"]["Code"] == "403"
        assert exc.value.response["Error"]["Message"] == "Forbidden"
def _anon_client(service: str):