### 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.
raise NoSuchKey("The specified key does not exist.", Key=key)
        response: GetObjectOutput = call_moto(context)
        
        if bucket in self.get_store().bucket_versioning_status and "VersionId" not in response:
            response["VersionId"] = "null"
        for request_param, response_param in s3_constants.ALLOWED_HEADER_OVERRIDES.items():
            if request_param_value := request.get(request_param):  
                response[response_param] = request_param_value  
        moto_backend = get_moto_s3_backend(context)
        moto_bucket = get_bucket_from_moto(moto_backend, bucket=bucket)
        key_object = get_key_from_moto_bucket(moto_bucket, key=key, version_id=version_id)
        if not config.S3_SKIP_KMS_KEY_VALIDATION and key_object.kms_key_id:
            validate_kms_key_id(kms_key=key_object.kms_key_id, bucket=moto_bucket)
        if checksum_algorithm := key_object.checksum_algorithm:
            
            response["ContentEncoding"] = ""
        if request.get("ChecksumMode") == "ENABLED" and checksum_algorithm:
            
            
            checksum = get_object_checksum_for_algorithm(
                checksum_algorithm=checksum_algorithm,
                data=key_object.value,
            )
            response[f"Checksum{checksum_algorithm.upper()}"] = checksum  
        response["AcceptRanges"] = "bytes"
        return response
    @handler("PutObject", expand=False)
    def put_object(