Add data-platform-github-access repo

[AntFMoJ]

If this work is being tracked by an issue, please link it below

Split out Github Component to Separate Repo

What does this PR achieve?

This PR creates a new repo data-platform-github-access.

• I have reviewed the style guide and ensured that my code complies with it
• All checks have passed (or override label applied)
• I have self-reviewed my code
• I have reviewed the checks and can attest they're as expected

[github-actions]

Terraform Component 🧱: github

Checkov 🛂: success

Trivy 🛂: success

Static Analysis Override Label 🏷️: false

Pusher: @AntFMoJ, Action: pull_request, Working Directory: terraform/github, Workflow: Terraform, Marker: github_static_analysis

[github-actions]

Terraform Component 🧱: github

Terraform Initialization ⚙️: success

Terraform Validation 🤖: success

Terraform Plan 🛠️: success

Pusher: @AntFMoJ, Action: pull_request, Working Directory: terraform/github, Workflow: Terraform, Marker: github_plan

[Gary-H9]

LGTM