[Issue] add additional allowed attribute

[m2-assistant[bot]]

This issue is automatically created based on existing pull request: magento/magento2-page-builder#885: add additional allowed attribute

---

data-background-lazy-load is automatically added in pagebuilder for a text element, but is not allowed and leads to a warning message when saving e.g. an attribute text, therefore whitelist this additional attribute

Description (*)

Story

Bug

Task

Fixed Issues (if relevant)

1. magento/magento2-page-builder#<issue_number>: Issue title

Builds

Related Pull Requests

Manual testing scenarios (*)

1. ...
2. ...

Questions or comments

Checklist

• [ ] Pull request has a meaningful description of its purpose
• [ ] All commits are accompanied by meaningful commit messages
• [ ] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• [ ] All automated tests passed successfully (all builds are green)