[web] Add setInitialReduxState action

Summary:
ENG-4752
Depends on D9124

Action for the previously introduced endpoint. It's defined inside web and doesn't have the STARTED, SUCCESS, FAILED actions because:

• This is a web-specific endpoint that returns (and expects) web-specific data (e.g. urlInfo, web nav info)
• To simulate the previous behaviour as much possible this action shouldn't interact much with other reducers and that's why it's inside of the web reducer
• We don't really have use case for tracking progress and failure currently. The app can't function at all until this endpoint is called successfuly
• Adding the STARTED etc. variants and useDispatchActionPromise would require moving it to lib and BaseAction. But it can't be moved to lib because it uses web-specific types

If ever decide to expand it to native, it shouldn't be much of a problem to rework it (the added code is quite small).

Test Plan:
Call:

const callGetInitialReduxState = useServerCall(getInitialReduxState);
const urlInfo = infoFromURL(decodeURI(window.location.href));
const payload = await callGetInitialReduxState(urlInfo);
dispatch({ type: setInitialReduxState, payload });

after the app loaded.

• Check if the action contained the expected payload.
• Check that diff after applying this action only contained lastUserInteractionCalendar, lastPruned, updatesCurrentAsOf etc. (the "static" data was the same)

Reviewers: kamil, inka, atul

Reviewed By: kamil

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D9140