fix(redis): add default auth to redis clusters

[jaylindquist]

Changes

Using redis in a cluster with authentication causes the following error:

WARN: Error while setting Redis cache value (repository=/)
"err": {"message": "NOAUTH Authentication required."}

This change adds the username and password from the redis URL as defaults for connections to non-root node servers as described in the node redis docs

Context

Logs and motivation in #37319

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[rarkins]

We need some time to check with some known users of cluster mode to confirm that none of them are using username/password. If they are, then we need to reconfirm the assumptions which lead to this PR

[github-actions]

Hi there,

Please don't merge from main into your PR's branch unless you have a merge conflict or have a specific reason to do so. Doing so consumes CI systems unnecessarily, and also resets CI approvals if this is your first PR to the repo. This repo uses GitHub's Merge Queue, which will automatically test your PR against main before merging, so it's no longer necessary to always keep branches up-to-date.

Thanks,

The Renovate team

[jaylindquist]

@rarkins are their any updates from customers?

[jamietanna]

(I've raised this internally at Mend, thanks for your patience!)