Make environment pin work with GraphQL

What does this MR do and why?

The new environments page is built using local GraphQL state management, and so the ability to cancel the auto-stopping of environments needs to rely on it instead of the event hub.

To ensure everything still works until I am ready to delete the old environments page, the new opt-in graphql prop is added to enable this functionality.

Screenshots or screen recordings

No visual changes

How to set up and validate locally

1. Make sure to turn on the new_environments_table feature flag. On the GitLab repository, run:

cd ./bin 
./rails console
Feature.enable(:new_environments_table) //turns on the feature flag
Feature.disable(:new_environments_table) //turns off the feature flag, takes some time to kick in

1. Enable runners in your GDK/Gitpod -- see instructions
2. Then add the following .gitlab-ci.yml to a project for some deployments:

stages:
    - deploy
    - stop
image: alpine:latest

deploy-prod:
    stage: deploy
    script:
        - sleep 6000
        - echo "deploying prod"
    environment:
        name: production

deploy-staging:
    stage: deploy
    script:
        - echo "deploying staging"
    environment:
        name: staging
        url: https://example.com
    when: manual

deploy-review:
    stage: deploy
    script:
        - echo "Deploying review/$CI_COMMIT_REF_NAME"
    environment:
        name: review/$CI_COMMIT_REF_NAME
        auto_stop_in: 1 week
    only:
        - branches
    except:
        - main


stop_review_app:
  script: stop-review-app
  stage: stop
  environment:
    name: review/$CI_COMMIT_REF_SLUG
    action: stop
  rules:
    - if: $CI_MERGE_REQUEST_ID
      when: manual

Make an MR, run a pipeline for it, and check out the environments page!

MR acceptance checklist

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