would like to see CI_JOB_RESULT for GitLab CI/CD Variables

Description

For each CI job, would like to get job status through Variables, will helpful when reporting to special Webhook.

Proposal

https://docs.gitlab.com/ee/ci/variables/README.html , CI/CD Variables already have bunch of useful ones, it will be great if have CI_JOB_RESULT inside.

Links / references

https://docs.gitlab.com/ee/ci/variables/README.html