### 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,
        request: PutObjectRequest,
    ) -> PutObjectOutput:
        
        
        
        if checksum_algorithm := request.get("ChecksumAlgorithm"):
            verify_checksum(checksum_algorithm, context.request.data, request)
        moto_backend = get_moto_s3_backend(context)
        moto_bucket = get_bucket_from_moto(moto_backend, bucket=request["Bucket"])
        if not config.S3_SKIP_KMS_KEY_VALIDATION and (sse_kms_key_id := request.get("SSEKMSKeyId")):
            validate_kms_key_id(sse_kms_key_id, moto_bucket)
        try:
            response: PutObjectOutput = call_moto(context)
        except CommonServiceException as e:
            
            if e.code == "InvalidStorageClass":
                raise InvalidStorageClass(
                    "The storage class you specified is not valid",
                    StorageClassRequested=request.get("StorageClass"),
                )
            raise
        
        
        
        key_object = get_key_from_moto_bucket(moto_bucket, key=request["Key"])