feat: add validation for allowed blocks in registered patterns#9345

USERSATOSHI wants to merge 5 commits intoWordPress:trunkWordPress/wordpress-develop:trunkfrom

USERSATOSHI:try/add-block-validation-wp-block-pattern-registryUSERSATOSHI/wordpress-develop:try/add-block-validation-wp-block-pattern-registryCopy head branch name to clipboard