Add approval requirements for production in azure pipeline (#122)

The changes introduced additional approval checks for the production environment. Variables `prod_requires_approval` and `prod_producer_approval` have been added into the azure-release-pipeline.yml file. This ensures that any deployment to the production environment must have necessary approvals.

Co-authored-by: igba.ujege <igba.ujege@bjss.com>

Author: adrianparr

azure/azure-release-pipeline.yml

@@ -30,6 +30,8 @@ extends:
         service_name: ${{ variables.service_name }}
         short_service_name: ${{ variables.short_service_name }}
         service_base_path: ${{ variables.service_base_path }}
+        prod_requires_approval: true
+        prod_producer_approval: true
         jinja_templates:
             NHS_CONTENT_API_TARGET_SERVER: nhs-website-content-api
         apigee_deployments: