Remove AJV usage from combinator mappers

Direct AJV usage in renderers (i.e. oneof renderer to determine applicable sub schema) should be removed completely as this is a hacky attempt to select the suitable subschema.
In general, we want to get rid of mandatory ajv usage in general.

For combinator renderers, AJV is invoked in `mapStateToCombinatorRendererProps`. This should be re-written to use a heuristic instead:
- If there is an type/kind/id (in this order) attribute: use to select initial entry. See if we can match this against a const in the schema. Otherwise try with first string and/or number property.
- id property should be configurable via a custom JSON Schema attribute (we already use a custom i18n attribute). The new attribute should start with x-jsf-. I.e. x-jsf-type-property
- allOf: Investigate whether calling mapStateToCombinatorRendererProps in mapStateToAllOfProps is necessary