Github actions with deprecated node 20 version warnings

[SjurSutterudSagen]

We currently have 3 actions that use a deprecated version of Node (20) that will be affected when Github removes support for that version in their runners on June 2. https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

1. powerful-pr-comment: The action for setting the comment on PRs with the 4 different PR links, for testing. This one seems not to be maintained, since it has no activity in the last 2 years. We should look for an alternative here. https://github.com/jupier/powerful-pr-comment
2. github-run-tests-action: This is the mabl action, and there is an approved PR there with the update to node 24. Just not merge yet. Upgrade to Node 24/PNPM + Await Completion mablhq/github-run-tests-action#69
3. cloudflare/wrangler-action: The cloudflare deploy action, also has a PR with the node 24 support. Update default Wrangler version to v4.x cloudflare/wrangler-action#412