### 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.
data = "1234567890 " * 100
        
        upload_file_ = BytesIO()
        mtime = 1676569620  # hard
        with gzip.GzipFile(fileobj=upload_file_, mode="w", mtime=mtime) as filestream:
            filestream.write(data.encode("utf-8"))
        # Up
        response = aws_client.s3.put_(
            Bucket=s3_bucket,
            Key="test.gz",
            ContentEncoding="gzip",
            Body=upload_file_.getvalue(),
        )
        snapshot.match("put-", response)
        # Down
        downloaded_ = aws_client.s3.get_(Bucket=s3_bucket, Key="test.gz")
        snapshot.match("get-", downloaded_)
        download_file_ = BytesIO(downloaded_["Body"].read())
        with gzip.GzipFile(fileobj=download_file_, mode="rb") as filestream:
            downloaded_data = filestream.read().decode("utf-8")
        assert downloaded_data == data
    @pytest.mark.aws_validated
    @pytest.mark.skip_snapshot_verify(condition=is_old_provider, paths=["$..VersionId"])
    def test_multipart_copy__etag(self, s3_bucket, s3_multipart_upload, snapshot, aws_client):