Fix renewal form endpoint

[mwvolo]

This endpoint returns books used and student numbers to pre-populate the renewal form, creating a more frictionless experience for instructors to confirm usage. This should fix the form auto-population, while also adding some fields that might be useful in the future.

No FE changes are required to support this. It used to work, then it stopped. Now it's back.

This will populate the renewal form with books and previous student count reported by an instructor who has an adoption that needs to be confirmed.

[mwvolo]

@TomWoodward this is ready for a look when you have time.

Creative Services is planning to send a mass renewal email in the next two weeks and I was hoping to get this out before then (it'll make the user experience a lot better). Do you have any concerns with me merging, moving this to staging, getting some folks to help test, then moving to production next week?

[sentry-io[bot]]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ ValidationError: '“%(value)s” is not a valid UUID.' salesforce.management.commands.update_opportuni... View Issue
• ‼️ ValueError: badly formed hexadecimal UUID string salesforce.management.commands.update_opportuni... View Issue
• ‼️ TypeError: 'NoneType' object is not subscriptable salesforce.management.commands.update_opportuni... View Issue

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