chore: Renames docs job and runs on shared runner

[bthomee]

High Level Overview of Change

Renames the docs job from job to documentation for better readability, and makes it run on the shared runner.

Context of Change

We were pulling our Docker images from DockerHub without logging in, causing us to run into rate limits. To solve this, the images were pushed to our GitHub registry, but the documentation pipeline cannot access them as it runs on the GitHub runner instead of our own runner. This change makes the pipeline run on our shared runner.

As the documentation job name job is meaningless, this PR renames it to documentation.

Type of Change

• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.1%. Comparing base (c4308b2) to head (9f32236).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #5398   +/-   ##
=======================================
  Coverage     78.1%   78.1%           
=======================================
  Files          795     795           
  Lines        68598   68599    +1     
  Branches      8278    8277    -1     
=======================================
+ Hits         53593   53595    +2     
+ Misses       15005   15004    -1     

see 4 files with indirect coverage changes

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