### 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.
self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> NotificationConfiguration:
        
        
        get_bucket_from_moto(get_moto_s3_backend(context), bucket=bucket)
        return self.get_store().bucket_notification_configs.get(bucket, NotificationConfiguration())
    def get_bucket_website(
        self, context: RequestContext, bucket: BucketName, expected_bucket_owner: AccountId = None
    ) -> GetBucketWebsiteOutput:
        
        
        moto_backend = get_moto_s3_backend(context)
        get_bucket_from_moto(moto_backend, bucket)
        if not (website_configuration := self.get_store().bucket_website_configuration.get(bucket)):
            ex = NoSuchWebsiteConfiguration(
                "The specified bucket does not have a website configuration"
            )
            ex.BucketName = bucket
            raise ex
        return website_configuration
    def put_bucket_website(