[Discover] Replace DiscoverInternalStateContainer with Redux based InternalStateStore (#208784)

## Summary

This PR replaces Discover's current `DiscoverInternalStateContainer`
(based on Kibana's custom `ReduxLikeStateContainer`) with an actual
Redux store using Redux Toolkit. It's the first step toward migrating
all of Discover's state management to Redux as part of the Discover tabs
project.

Part of #210160.
Resolves #213304.

### Checklist

- [ ] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/src/platform/packages/shared/kbn-i18n/README.md)
- [ ]
[Documentation](https://www.elastic.co/guide/en/kibana/master/development-documentation.html)
was added for features that require explanation or tutorials
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios
- [ ] If a plugin configuration key changed, check if it needs to be
allowlisted in the cloud and added to the [docker
list](https://github.com/elastic/kibana/blob/main/src/dev/build/tasks/os_packages/docker_generator/resources/base/bin/kibana-docker)
- [ ] This was checked for breaking HTTP API changes, and any breaking
changes have been approved by the breaking-change committee. The
`release_note:breaking` label should be applied in these situations.
- [ ] [Flaky Test
Runner](https://ci-stats.kibana.dev/trigger_flaky_test_runner/1) was
used on any tests changed
- [x] The PR description includes the appropriate Release Notes section,
and the correct `release_note:*` label is applied per the
[guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

---------

Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>

examples/discover_customization_examples/public/plugin.tsx

@@ -241,9 +241,9 @@ export class DiscoverCustomizationExamplesPlugin implements Plugin {
           >();
           const stateStorage = stateContainer.stateStorage;
           const dataView = useObservable(
-            stateContainer.internalState.state$,
-            stateContainer.internalState.getState()
-          ).dataView;
+            stateContainer.runtimeStateManager.currentDataView$,
+            stateContainer.runtimeStateManager.currentDataView$.getValue()
+          );
 
           useEffect(() => {
             if (!controlGroupAPI) {
@@ -262,7 +262,6 @@ export class DiscoverCustomizationExamplesPlugin implements Plugin {
             });
 
             const filterSubscription = controlGroupAPI.filters$.subscribe((newFilters = []) => {
-              stateContainer.internalState.transitions.setCustomFilters(newFilters);
               stateContainer.actions.fetchData();
             });