rocky/aarch64: switch to versioned Erlang 26/27 repos

[bbezak]

Replace unversioned aarch64 Erlang COPR with erlang-26 and erlang-27 Aligns with Kolla change [1].

[1] https://review.opendev.org/c/openstack/kolla/+/959692

(cherry picked from commit 52ad7b2)

[gemini-code-assist]

Summary of Changes

Hello @bbezak, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the Erlang repository sources for aarch64 systems to use specific versioned repositories (Erlang 26 and 27). This change is crucial for maintaining compatibility with the latest RabbitMQ versions and aligning the system with recent Kolla project updates, ensuring a stable and up-to-date environment for dependent services.

Highlights

• Erlang Repository Update: Switched aarch64 Erlang RPMs from an unversioned COPR to versioned erlang-26 and erlang-27 COPR repositories for Rocky 9. This change specifically targets aarch64 architectures, while x86_64 remains unaffected.
• RabbitMQ Compatibility: The repository switch is implemented to support newer RabbitMQ versions (3.13/4.1) and ensure alignment with recent changes in Kolla, enhancing compatibility and future-proofing the setup.
• Configuration Updates: Introduced new variables and updated existing configurations across various YAML files to reflect the new versioned Erlang repositories and their corresponding URLs. This includes updates to CI environment definitions, image tags, and Pulp repository versions.

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[gemini-code-assist]

Code Review

This pull request switches to versioned Erlang repositories for aarch64 to align with a Kolla change. The changes involve updating several YAML configuration files to introduce new repository definitions and image tags. While the intent is clear, I've identified a critical typo in an image tag and a logical flaw in how repository versions are determined, which could lead to incorrect URLs and build failures. Please see the detailed comments.