Response files: Add spacing between multi-select option answers

# Separate choice options to make the response data more readable

_First identifies in file upload QA_

Also from **Support ticket:** https://cds-snc.freshdesk.com/a/tickets/18729
**Feedback:** when multiple choices are selected on a checkbox field, the choices in the CSV file are comma-delimited. Since they used a comma in the text of some of the choices themselves, separating out the selections is proving challenging (a simple find-replace won’t do). Suggestion: use a different character to separate multichoice responses.

## Description

All options selected as part of checkbox or attestation type answers get glued together in the HTML format (and perhaps other formats), making these harder to read.

**Note**: to check review page also, and save progress HTML files, as well as the receipt file for confirmations

## Details

Mac, OS, Chrome, Desktop, HTML response

## Screenshot