🧹 Use Renovate and deb datasource for managing apt package manager dependencies

[tom-webber]

User Story

As a DevOps
I need/want/expect to have dependencies updates raised as PRs automatically
So that we don't have to update them manually when a build fails due to unrelated version incompatibility / outdatedness

Value / Purpose

The Renovate deb datasource is able to update OS packages for Ubuntu via regex matching. We should use this to keep package versions up to date for the AP base image

Proposal

Make use of the renovate deb datasource:

• Move pinned package versions to variables (example)
• craft a package rule per package
• set up a renovate configuration to run on the specified parts of the repo

Additional Information

No response

Definition of Done

• Renovate set up with base image
• package dependencies updated to deb regex format
• README has been updated
• Another team member has reviewed
• Tests are green