API schema is not validated for adviser scenario

[mayaCostantini]

Describe the bug
Integration tests for the scenario Run thamos advise on a Git repo for runtime environment ps-nlp-tensorflow-gpu , without user stack supplied and without static analysis in stage raise an error related to the Open API schema failing to be validated:

'stack_info' is a required property\n\nFailed validating 'required' in schema['properties']['result']['properties']['report']

To Reproduce
See last integration tests report.

[mayaCostantini]

/assign @mayaCostantini
/priority critical-urgent
/lifecycle active
/kind bug