refactor: update GitHub workflow dependencies

[fmalatino]

Description
This PR updates our GitHub workflows to use actions/checkout@v6, actions/setup-python@v6, and actions/cache@v5. Changes are minimal, but require a new minimal GHA runner version, which forces the major version bumps.

How Has This Been Tested?
Using currently implemented CI

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
• Any dependent changes have been merged and published in downstream modules
• New check tests, if applicable, are included
• Targeted model if this changed was triggered by a model need/shortcoming

[romanc]

LGTM 👍

Question: why is this PR (still) a draft?

Regarding the GHA caches: GitHub will delete cache entries that haven't been accessed within 7 days and we only ever create caches upon merging into develop. So I guess we lost caches over the holidays.

[fmalatino]

LGTM 👍

Question: why is this PR (still) a draft?

Regarding the GHA caches: GitHub will delete cache entries that haven't been accessed within 7 days and we only ever create caches upon merging into develop. So I guess we lost caches over the holidays.

I am not sure if it is good practice, but I thought I would keep it in draft until I was sure the tests pass.

[romanc]

Question: why is this PR (still) a draft?

I am not sure if it is good practice, but I thought I would keep it in draft until I was sure the tests pass.

For me, "draft PR" signals "not ready for review" unless explicitly requested (e.g. in scenarios where one would reach out for early feedback). This matches GitHub lingo, which would show a button "Ready for review" on draft PRs. This PR seemed done and "ready for review".

[fmalatino]

Since we have not had a merge into develop in about 2 months, and as noted by @romanc, caches are only created on such merges, if agreed upon by all reviewers, I suggest we merge this PR with the two failing translate tests given that the changes brought in will not effect the functionality of the code.

[romanc]

Since we have not had a merge into develop in about 2 months, and as noted by @romanc, caches are only created on such merges, if agreed upon by all reviewers, I suggest we merge this PR with the two failing translate tests given that the changes brought in will not effect the functionality of the code.

+1 for merging this with admin powers