fix!: update to the new runner registration system

[Racer159]

Description

This updates the registration system to the new runner authentication token (counting it as a bug fix as users have observed manual steps being needed in the current workflow).

Related Issue

Fixes #74 Fixes #28

Type of change

• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Other (security config, docs update, etc)

Checklist before merging

• [X] Test, docs, adr added or updated as needed
• [X] Contributor Guide Steps followed

[Racer159]

New test regimen adds ~1 min

[Racer159]

Added breaking change since this now requires UDS Core v0.22.0