Remove local application service

[flash1293]

Follow up of #61304

Once the legacy kibana app is fully migrated (including management and all server side code), the "local application service" (src/legacy/core_plugins/kibana/public/local_application_service/local_application_service.ts) rendering new platform apps in the legacy platform is not necessary anymore and can be removed together with the legacy plugin definition.

However URLs pointing to the kibana app still have to be handled for BWC (e.g. app/kibana#/discover should be redirected to app/discover#/). To be able to do this, the kibana_legacy plugin should register a plugin with the kibana id to pick up these URLs. The implementation of this app can be very rudimentary as it just has to redirect to the new location (not necessary to load angular or anything else):

core.application.register({
  id: 'kibana',
  async mount() {
    const newUrl = lookupUrlRedirect(window.location.href);
    window.location.replace(newUrl);
    // TODO error handling
  }
});

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)