feat(products): updating Product Configuration extension points to use block extension api & components

[kmdavis]

Part of https://github.com/Shopify/bundles-app/issues/2968

Background

When the product configuration extension points were first created, all data necessary for rendering had to passed in. This is no longer the case, as ui extensions now have access to a graphql api. The prior PR in this chain added the product or variant id as selected[0].id (the same pattern used by block extensions), and this PR updates the types to reflect this new field, and marks the existing product/productVariant objects as deprecated (we'll remove them in a few months, once all third party apps are no longer using it)

Checklist

• I have 🎩'd these changes
• I have updated relevant documentation

[github-actions]

We detected some changes in packages/*/package.json or packages/*/src, and there are no updates in the .changeset directory. If the changes are user-facing and should cause a version bump, run yarn changeset to track your changes and include them in the next release CHANGELOG. If you are making simple updates to repo configuration, examples, or documentation, you do not need to add a changeset.