Ensure all future merge requests pass gitlab automated tests.

Problem/Motivation

Now that all of our basic gitlab automated tests pass we should not allow reintroduction of code that fails those tests.

Steps to reproduce

It is currently possible to merge code that fails the gitlab automated tests.

Proposed resolution

Add configuration to gitlab-ci.yml to stop allowing merging of code that fails automated tests.

cspell:
  allow_failure: false
eslint:
  allow_failure: false
phpcs:
  allow_failure: false
phpstan:
  allow_failure: false

Remaining tasks

1. Add merge request with updates to gitlab-ci.yml

User interface changes

N/A

API changes

N/A

Data model changes

N/A