Release 2972
Trello card
https://trello.com/c/kPYzi2gv/678-se-delete-aks-review-app-workflow
Context
added the destroy function so that review apps are destroyed after closing PR
Changes proposed in this pull request
added destroy_aks.yml
Guidance to review
make ci review_aks terraform-destroy-aks PR_NUMBER=${{github.event.number}}