### 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.key_value("DisplayName"),
                snapshot.transform.key_value("ID", value_replacement="owner-id"),
            ]
        )
        aws_client.s3.put_bucket_cors(
            Bucket=s3_bucket,
            CORSConfiguration={
                "CORSRules": [
                    {
                        "AllowedMethods": ["GET", "POST", "PUT", "DELETE"],
                        "AllowedOrigins": ["localhost"],
                    }
                ]
            },
        )
        response = aws_client.s3.get_bucket_cors(Bucket=s3_bucket)
        snapshot.match("get-bucket-cors", response)
        result = aws_client.s3.get_bucket_acl(Bucket=s3_bucket)
        snapshot.match("get-bucket-acl", result)
        with 
            aws_client.s3.get_bucket_acl(Bucket="bucket-not-exists")
        snapshot.match("get-bucket-not-exists", e.value.response)
    @pytest.mark.aws_validated
    @pytest.mark.skip_snapshot_verify(
        condition=is_old_provider,
        paths=["$..VersionId", "$..ContentLanguage", "$..Error.RequestID"],
    )
    def test_s3_uppercase_key_names(self, s3_create_bucket, snapshot, aws_client):