Update test to navigate to the children tab before searching for a child

This test was expecting the session overview's action list to include the
link "1 child with no response" but it didn't appear because that child's
programme status was `needs_consent_request_scheduled` rather than
`needs_consent_no_response`.

Mavis expanded programme statuses with consent-related sub-statuses.
A patient that previously appeared under the filter “No response” is
will now appear under “Request scheduled”.

We can still allow the test to continue the journey by clicking on the
"Childrens" tab before searching for the child's name.

Jira-Issue: MAV-502

Author: jhenderson

tests/test_sessions.py

@@ -216,7 +216,7 @@ def test_consent_filters(
     - Consent refused checkbox is checked for the child.
     """
     child = children[Programme.HPV][0]
-    SessionsOverviewPage(page).review_child_with_no_response()
+    SessionsOverviewPage(page).tabs.click_children_tab()
     SessionsChildrenPage(page).search.search_and_click_child(child)
     SessionsPatientPage(page).click_record_a_new_consent_response()