Release 3016

Trello card

https://trello.com/c/nzPVjeyQ/796-fix-school-experience-review-app-url

Context

the dfe signin link was not working due to issues with the bash script that creates the link

Changes proposed in this pull request

fix the bash script and also ensure that terraform returns the link properly

Guidance to review

test dfe link eg
https://get-school-experience-review-pr-3.test.teacherservices.cloud/schools/change