### 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.
snapshot.add_transformer(snapshot.transform.s3_api())
        # Obje
        # http
        metadata = {"foo": "bar"}
        _key = "key-by-hostname"
        # put 
        url = aws_client.s3.generate_presigned_url(
            "put_",
            Params={"Bucket": s3_bucket, "Key": _key, "Metadata": metadata},
        )
        assert "x-amz-meta-foo=bar" in url
        response = .put(url, data="content 123", verify=False)
        assert response.ok, f"response returned {response.status_code}: {response.text}"
        # resp
        assert not response.text
        # asse
        response = aws_client.s3.head_(Bucket=s3_bucket, Key=_key)
        assert response.get("Metadata", {}).get("foo") == "bar"
        snapshot.match("head_", response)
    @pytest.mark.aws_validated
    def test_get__ignores_request_body(self, s3_bucket, aws_client):