[Python APIView] fix token file generation CI to fail on correct job

Currently, if the generation job fails in the APIView pipeline, it's still green but then fails on the sending the request to APIView. Instead, we want to catch and fail in the correct place to make it easier for users to debug.

ex.

To fix this issue:
1. Make a change to "Generate APIView Token files" so that the job fails/is red when there's an error: https://github.com/Azure/azure-sdk-tools/blob/1df17eef13f8ea2d3f72f4ac2cdbe15e93fef70e/eng/pipelines/templates/steps/apiview-review-gen.yml#L20

Note that the error may look like a Python error, JS error, or something else.