Default url for request visit button from portal page

[AykhanAhmadli]

Right now we are using ${IntakeFlowPageRoute.Welcome.path.replace(':schedule-type', 'provider').replace(':slug', 'daniel').replace(':visit-service', 'in-person').replace(':visit-type', 'prebook')} as a default request visit choice, which wouldn't work for the other projects. Need to propose a different solution for the request visit button.

[GiladSchneider]

We should have an intermediate page that generates a list of available schedules of locations, providers and groups. The user picks from those to see a schedule. If none have been set up you display a message saying “No location, provider or group schedules have been created.”

[GiladSchneider]

✅ tested and functional locally and on the demo env