PC-1364: Loft insulation question

[Glenn-Clarke]

Link to Jira ticket

Description

Added new answer, and reworded previous answers to be clearer.

Checklist

• I have made any necessary updates to the documentation
• I have checked there are no unnecessary IDE warnings in this PR
• I have checked there are no unintentional line ending changes
• I have added tests where applicable
• If I have made any changes to the code, I have used the IDE auto-formatter on it
• If I have made any changes to Python files (even if not changing any content strings), I have run make extract-translations
• If I have made any changes to website flow, I have updated the Flow Miro Board
• If I have made any changes to website flow, I have checked forward and back behaviour is still consistent

Screenshots

[jdgage]

There's a get_loft_insulation_answers in tests/routing that might want updating?

The ticket also says "This will result in the same outcome in the CSV as if selecting less than 100mm" - does this get handled?

[Glenn-Clarke]

Ah! I'm working on the CSV handling now, I missed that part.

I've sorted out the tests locally in the meantime.

[Glenn-Clarke]

It should now override the no_insulation answer into the less_than_threshold upon creation. So to a user during the journey, it will look as if they have chosen no_insulation, but to suppliers it will appear to be less_than_threshold :)