New Block Forms Prompt for Pattern Update

Problem/Motivation

When editing an existing block that has been updated to the latest schema after deploying the Beta 5 release, the JSON Editor form is loaded with a bundled schema, but when creating a new block with a pattern containing references, the bundled schema is not used and AJAX requests are still triggered. The unbundled schema is also compared against the bundled version which triggers a prompt for the user to update the schema even on a form creating a new block.

Steps to reproduce

1. Install the patternkit, patternkit_example, and layout_builder modules
2. Enable layout builder on a content type
3. Edit the layout for this content type
4. Add a new "[Patternkit] Example with Reference" block
5. (X) Observe the prompt at the top of the form to update the pattern schema and template

Note: This only happens when creating new blocks for patterns containing references. If a pattern does not contain references, the bundled and unbundled schema are the same, so no prompt is displayed.

Proposed resolution

Ensure when loading a fresh version of the pattern for the block form, the bundled schema is loaded for use.

Remaining tasks

User interface changes

Editors should no longer be prompted to update a pattern when creating a new block.

API changes

None

Data model changes

None