Support custom ID for origins

[lukemarshdv]

We currently use Terraform for our CloudFront configuration and our origins have a custom ID.

I'm using the serverless-next.js plugin and it would a good idea to allow a custom origin ID if specified or just use the host as it does now.

[pradyumna1]

@danielcondemarin this feature is already supported in serverless-next.js repository's cloudfront component, right? I am talking about this PR: serverless-nextjs/serverless-next.js#508