Validate Component config entity props' `required` value matches the actual source for the `active` version

Overview

In 🐛 Deleting or renaming SDC prop will break xb pages using old version of the component Active we added the `required` flag to the prop field definitions stored in a Component config entity version.
In 📌 Support adding a new required prop with an example to an in-use code component Active (https://git.drupalcode.org/project/canvas/-/merge_requests/398#note_646532) we discovered that some test config had the wrong value.

Proposed resolution

Add a constraint that verifies that for the canvas.generated_field_explicit_input_ux type, the active version required value for each prop matches the reality of its source.

User interface changes

None.