[Issue #2847] Hide v0/v0.1 opportunity endpoints from swagger (#2848)

## Summary
Fixes #2847

### Time to review: __3 mins__

## Changes proposed
Hide the v0/v0.1 endpoints from the OpenAPI docs

## Context for reviewers
The endpoints will continue to function, we just tell the processes that
APIFlask uses to generate the OpenAPI spec to skip these endpoints. The
endpoints continue to work uneventfully.

Note: we use these already for a few things, as we also use blueprints
to define backend API tasks with this flag set.

## Additional information
What things look like now:
![Screenshot 2024-11-13 at 4 40
21 PM](https://github.com/user-attachments/assets/27505e2c-8ee5-4233-b146-ebb8aeafb389)

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Co-authored-by: nava-platform-bot <[email protected]>