Add workflow to validate source repos definitions and synchronise existing definitions

[MoteHue]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces a Python script to validate that repository definitions are consistent between Terraform and Ansible configurations. The review feedback identifies a bug in the group extraction logic where trailing spaces in Jinja2 templates would cause matching failures, and it recommends properly propagating the script's exit code using sys.exit() within a standard main entry block to ensure CI/CD pipelines can detect validation failures.

[MoteHue]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces a validation script, scripts/validate-source-repos.py, designed to synchronize repository lists and codeowner group assignments between Terraform and Ansible configurations. The review feedback focuses on improving the robustness and idiomatic quality of the script, specifically by using more efficient file-loading methods for JSON and YAML, preventing potential KeyError exceptions when accessing repository data, and ensuring group names are correctly normalized during parsing.

[stackhpc-ci]

Terraform Format and Style 🖌success

Terraform Initialization ⚙️success

Terraform Validation 🤖success

Validation Output

Warning: Deprecated attribute

  on repositories.tf line 20, in resource "github_repository" "repositories":
  20:       has_downloads,

The attribute "has_downloads" is deprecated. Refer to the provider
documentation for details.
Success! The configuration is valid, but there were some validation warnings
as shown above.

Terraform Plan 📖success

Show Plan

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Pusher: @MoteHue, Action: pull_request, Working Directory: ``, Workflow: Terraform GitHub

[MoteHue]

Example failure here: https://github.com/stackhpc/stackhpc-release-train/actions/runs/24990491954/job/73174589214
(from before I fixed these repo definitions in this PR)