XLSForm questionaire should come after building validation questions

[spwoodcock]

Describe the issue

• In the field we discovered that users would often go to a building, then speak to the owner first to ask for permission to collect data.
• As the building validation questions come first, they would resort to noting down the owners answers on another app, before going back to ODK Collect!
• The question order should be rethought to be most intuitive for the user.

Proposed solution

• The validation / digitization_correct was placed at the top so the fields could easily be hidden, to allow the user to edit below.
• This should be moved below the questions instead.
• They should still be hidden.

Additional context

• How do we best prevent the user overwriting the validation fields?
• We need the validation section to carry out conflation.
• The building selection will be handled by the custom ODK Collect version / load by intent feature, so this isn't an issue.

@ramyaragupathy as discussed