The built package is not validated against the schema

[ddbeck]

What type of issue is this?

Infrastructure issue

What is the issue?

It's possible for BCD's published package data to differ from the JSON schemas.

What behavior were you expecting?

Before publishing, the BCD infrastructure ought to validate the built data against the JSON schemas.

What version(s) of BCD is the issue present in?

• The current BCD release
• The current version of the main branch

Do you have anything more you want to share?

This would prevent issues like #27437.