[Faust.js] Replace CI/CD Pipeline with WP-GraphQL pipeline

[theodesp]

Description

Instead of using our own custom CI/CD pipeline to test the plugin and setting up the Docker WordPress tests we should re-use the one from WP-GraphQL since its more standardised.

Technical Details

• Use this pipeline making sure the references are correct:

  https://github.com/wp-graphql/wp-graphql/tree/develop/docker

[ChrisWiegman]

As we're already updating the pipeline here for Playwright and other features, this ticket is obsolete and I am closing it.