Implement OnyxSelect advanced async API

[BoppLi]

After we gathered some real-life project experience/feedback of OnyxSelect within an async context, we should rethink if we offer a more extensive control and stricter required types when OnxySelect is used with asynchronous data.

See #1564 (comment)

Initial draft was:

      withSearch: true | {
        /**
         * A filter function for synchronous filtering of the provided `options`. 
         * The default filter function will compare
         * the option labels with the `searchTerm`.
         */
        filterFunc: (option: SelectOption<TValue>, index: number, array: SelectOption<TValue>[]) => boolean;
      };

type Async = {
    async: true;
    debounce?: number;
    initialOption: SelectOption<TValue>;
    loadingLabel: string;
    request: (searchTerm: string, pagination: Pagination, abortSignal: AbortSignal) => SelectOption<TValue>[];
}