Migrate the redis module to the official extension catalog

[codebien]

What?

Move the current experimental Redis module as official k6/x/redis extension.

Checklist

• I have used a meaningful title for the PR.
• I have described the changes I've made in the "What?" section above.
• I have performed a self-review of my changes.
• I have run the npm start command locally and verified that the changes look good.

• I have made my changes in the docs/sources/k6/next folder of the documentation.
• I have reflected my changes in the docs/sources/k6/v{most_recent_release} folder of the documentation.
• I have reflected my changes in the relevant folders of the two previous k6 versions of the documentation (if still applicable to previous versions).

• I have made my changes in the docs/sources/k6/next folder of the documentation.

Related PR(s)/Issue(s)

[github-actions]

💻 Deploy preview deleted (Migrate the redis module to the official extension catalog).

[heitortsergent]

This looks good @codebien, thanks for opening the PR! I think we need to add the aliases to all the pages that we're moving, do you mind if I push a commit here to make that change?

[heitortsergent]

Thanks for opening the PR @codebien 🙇 . I updated some of the aliases, and also added the skip code instruction to these files so our GH Action would be happy.