### 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(self._get_presigned_snapshot_transformers(snapshot))
        # pres
        _key = "test-presigned-post-key"
        presigned_request = aws_client.s3.generate_presigned_post(
            Bucket=s3_bucket, Key=_key, ExpiresIn=2
        )
        # slee
        time.sleep(3)
        # atte
        response = .post(
            presigned_request["url"],
            data=presigned_request["fields"],
            files={"file": "file content"},
            verify=False,
        )
        exception = xmltodict.parse(response.content)
        exception["StatusCode"] = response.status_code
        snapshot.match("exception", exception)
        assert response.status_code in [400, 403]
    @pytest.mark.only_localstack
    @pytest.mark.skipif(
        condition=LEGACY_S3_PROVIDER,
        reason="Legacy S3 provider does not skip the signature validation",
    )
    def test_get_request_expires_ignored_if_validation_disabled(