MM-61700: Fix race conditions from web_hub initialization (#29214)

The Store variable was written to _after_ the server
started which was causing the race.

We simply move it to before we start the server.

While we are here, we fix yet another race condition
which was unrelated, but doing it in one sweep. This
was related to the user props access. When a user is updated,
there was 3 ws events that get sent out, 2 were deep-copied
whereas 1 was not. This led to race condition in postgres
binary-param mode where we were trying to set the user props.



https://mattermost.atlassian.net/browse/MM-61700

server/channels/app/platform/helper_test.go

@@ -106,15 +106,6 @@ func SetupWithStoreMock(tb testing.TB, options ...Option) *TestHelper {
 	mockStore := testlib.GetMockStoreForSetupFunctions()
 	options = append(options, StoreOverride(mockStore))
 	th := setupTestHelper(mockStore, false, false, tb, options...)
-	statusMock := mocks.StatusStore{}
-	statusMock.On("UpdateExpiredDNDStatuses").Return([]*model.Status{}, nil)
-	statusMock.On("Get", "user1").Return(&model.Status{UserId: "user1", Status: model.StatusOnline}, nil)
-	statusMock.On("UpdateLastActivityAt", "user1", mock.Anything).Return(nil)
-	statusMock.On("SaveOrUpdate", mock.AnythingOfType("*model.Status")).Return(nil)
-	emptyMockStore := mocks.Store{}
-	emptyMockStore.On("Close").Return(nil)
-	emptyMockStore.On("Status").Return(&statusMock)
-	th.Service.Store = &emptyMockStore
 	return th
 }
 
@@ -170,6 +161,18 @@ func setupTestHelper(dbStore store.Store, enterprise bool, includeCacheLayer boo
 		Suite:   &mockSuite{},
 	}
 
+	if _, ok := dbStore.(*mocks.Store); ok {
+		statusMock := mocks.StatusStore{}
+		statusMock.On("UpdateExpiredDNDStatuses").Return([]*model.Status{}, nil)
+		statusMock.On("Get", "user1").Return(&model.Status{UserId: "user1", Status: model.StatusOnline}, nil)
+		statusMock.On("UpdateLastActivityAt", "user1", mock.Anything).Return(nil)
+		statusMock.On("SaveOrUpdate", mock.AnythingOfType("*model.Status")).Return(nil)
+		emptyMockStore := mocks.Store{}
+		emptyMockStore.On("Close").Return(nil)
+		emptyMockStore.On("Status").Return(&statusMock)
+		th.Service.Store = &emptyMockStore
+	}
+
 	// Share same configuration with app.TestHelper
 	th.Service.UpdateConfig(func(cfg *model.Config) {
 		*cfg.TeamSettings.MaxUsersPerTeam = 50