PSCE-192 - feat: adds support for GitLab as a Provider type

[jpower432]

Refs: PSCE-192

Description

Adds GitLab API support

Type of change

• New feature (non-breaking change which adds functionality)

How has this been tested?

• Unit test added
• Integration test: TODO

Regression

• Check-only: https://github.com/jpower432/cautious-potato/actions/runs/5696324006/job/15441193255?pr=74
• Autofix: https://github.com/jpower432/cautious-potato/actions/runs/5696324008
• Create: https://github.com/jpower432/cautious-potato/actions/runs/5696349936
• Regenerate: https://github.com/jpower432/cautious-potato/actions/runs/5696347593/job/15441254508

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules