CCM-11966: Add new status TEMPLATE_PROOF_APPROVED to spec template

Author: m-salaudeen

infrastructure/terraform/modules/backend-api/spec.tmpl.json

@@ -777,7 +777,8 @@
           "VALIDATION_FAILED",
           "VIRUS_SCAN_FAILED",
           "WAITING_FOR_PROOF",
-          "PROOF_AVAILABLE"
+          "PROOF_AVAILABLE",
+          "TEMPLATE_PROOF_APPROVED"
         ],
         "type": "string"
       },