tests/int: Add IAM setup automation docs and misc fixes

Add instructions about how to create service accounts with IAM
permissions and populate the secrets and variables required in the CI.

Update the panic recovery code to ensure that the exit status surfaces
on panic along with a log message.

Signed-off-by: Sunny <darkowlzz@protonmail.com>

tests/integration/terraform/azure/aks.tf

@@ -13,6 +13,7 @@ module "acr" {
   location         = var.azure_location
   aks_principal_id = [module.aks.principal_id]
   resource_group   = module.aks.resource_group
+  admin_enabled    = true
   tags             = var.tags
 
   depends_on = [module.aks]