Remove serverless code from Pages

What does this MR do?

Supersedes !482 (closed)
Closes #347 (closed)
Closes #572 (closed)
Closes #357 (closed)

(I'm not sure about the last one)

TODO

• Added the Changelog (e.g. Changelog: feature) trailer to the commits that need to be included in the changelog
• Added unit tests (if required)
• Added acceptance tests (if required)
• Documentation (if required)
• Code review guidelines
• Go Style guidelines