`useK8sWatchResource` return type is incorrect.

export const useK8sWatchResource = <R extends K8sResourceCommon | K8sResourceCommon[]>(
  initResource: WatchK8sResource | null,
  initModel?: K8sModelCommon,
  options?: Partial<WebSocketOptions & RequestInit & { wsPrefix?: string; pathPrefix?: string }>,
): WatchK8sResult<R> => {

export type WatchK8sResult<R extends K8sResourceCommon | K8sResourceCommon[]> = [
  data: R,
  loaded: boolean,
  loadError: unknown,
]; 

`WatchK8sResult['data']` is of type `R`. However, the value of data may be `undefined` at times.

The affect of this is null checks may be missed. Or if eslint rules are in place may inform the dev that a correctly placed null check is unnecessary because the type can never be undefined.

The type for `useK8sWatchResource` should be updated to account for data possibly being `undefined`. This change needs to be applied in the dynamic-plugin-sdk.

cc vszocs@redhat.com