chore(review): fix tests for review router

[seaerchin]

Problem

Last release added a bunch of checks for sites that are undergoing a migration from github into our db (but not yet completed); this clashes with our code, which expects a fully migrated site (sites table in db populated, site members retrieved from db etc).

This leads to a couple of tests failing in review.spec.ts as the calls to calculate those pre-conditions are not mocked. This PR fixes this by mocking said calls.

Solution

for methods that have the new checks, there is a new beforeEach hook added to mock the call to the precondition. This causes the check to be false (ie, that the site has underwent a full migration), and continues on with the business logic rather than short-circuiting

[alexanderleegs]

I think the cleaner way of doing this would be to also insert the list of collaborators by adding user/site db entries before each of these tests. I'm fine with releasing this as is for now, but we should change it later on

[seaerchin]

I think the cleaner way of doing this would be to also insert the list of collaborators by adding user/site db entries before each of these tests. I'm fine with releasing this as is for now, but we should change it later on

this isn't an integration test so the service itself is mocked and there's no actual db calls being made. the integration test itself is fine as those actually exist