Rule suggestion: `no-meta-schema-default`

[FloEdelmann]

eslint/eslint#17656 added support for meta.defaultOptions in rules and mentions in the docs that Ajv's useDefaults option might be disabled in the future. See also https://github.com/eslint/rfcs/blob/main/designs/2023-rule-options-defaults/README.md:

This RFC proposes removing the useDefaults: true setting in a future major version of ESLint.

To prepare for that, a new ESLint rule could warn against using default in meta.schema already.