Revert codegen changes if only whitespace are changed

[cardil]

Revert codegen changes if only whitespace are changed. This should fix issues like: https://github.com/knative-extensions/sample-controller/actions/runs/13921922372/job/38956989826?pr=944

Originally posted by @cardil in knative-extensions/sample-controller#944 (comment)

/kind bug

[cardil]

/assign