APPT-2069 Fixed scope of CancelDateRangeWithBooking flag

[Dave-O-NHS]

Description

On the cancellation impact page, CancelADateRangeWithBookings flag was incorrectly blocking no sessions and no bookings pages.
This issue has been fixed, and CancelADateRangeWithBookings flag only restricts page for cancellation that contains sessions and bookings, in which case, we display "You cannot cancel these sessions" page.

Checklist:

• My work is behind a feature toggle (if appropriate)
• If my work is behind a feature toggle, I've added a full suite of tests for both the ON and OFF state
• The ticket number is in the Pull Request title, with format "APPT-XXX: My Title Here"
• I have ran npm tsc / lint (in the future these will be ran automatically)
• My code generates no new .NET warnings (in the future these will be treated as errors)
• If I've added a new Function, it is disabled in all but one of the terraform groups (e.g. http_functions)
• If I've added a new Function, it has both unit and integration tests. Any request body validators have unit tests also
• If I've made UI changes, I've added appropriate Playwright and Jest tests
• If I've added/updated an end-point, I've added the appropriate annotations and tested the Swagger documentation reflects the change

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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