Add GitLab CI pipelines for Varbase Workflow with Drupal standards, practice checks, and functional Workflow moderation tests

Problem/Motivation

Add GitLab CI pipelines for the varbase_workflow module, focusing on automated testing using Drupal coding standards and best practices.

This will enhance the module's stability.

Proposed resolution

• Add a .gitlab-ci.yml file and supporting configuration
• Run practice tests (drupal-check, linting, etc.)
• Have the VarbaseWorkflowTest back for Functional Javascript moderation tests.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Code review from 1 Varbase core team member
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes and Update Helper on new feature change/addition
• ❌ Release varbase-10.1.0-alpha3, varbase_workflow-3.1.0-beta1

Varbase update type

• ✅ No Update
• ➖ Optional Update
• ➖ Forced Update
• ➖ Forced Update if Unchanged

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Issue #3540295: Added GitLab CI pipelines for Varbase Workflow with Drupal standards, practice checks, and functional Workflow moderation tests