Alerting: Template API to return errutil errors (#91821)

pkg/services/ngalert/api/tooling/api.json

@@ -1906,7 +1906,7 @@
      "type": "array"
     }
    },
-   "title": "Headers represents the configuration for HTTP headers.",
+   "title": "Header represents the configuration for a single HTTP header.",
    "type": "object"
   },
   "Headers": {
@@ -3403,6 +3403,12 @@
   "Route": {
    "description": "A Route is a node that contains definitions of how to handle alerts. This is modified\nfrom the upstream alertmanager in that it adds the ObjectMatchers property.",
    "properties": {
+    "active_time_intervals": {
+     "items": {
+      "type": "string"
+     },
+     "type": "array"
+    },
     "continue": {
      "type": "boolean"
     },
@@ -4575,6 +4581,7 @@
    "type": "object"
   },
   "alertGroups": {
+   "description": "AlertGroups alert groups",
    "items": {
     "$ref": "#/definitions/alertGroup",
     "type": "object"
@@ -6173,9 +6180,6 @@
       "schema": {
        "$ref": "#/definitions/NotificationTemplates"
       }
-     },
-     "404": {
-      "description": " Not found."
      }
     },
     "summary": "Get all notification templates.",
@@ -6237,7 +6241,10 @@
       }
      },
      "404": {
-      "description": " Not found."
+      "description": "GenericPublicError",
+      "schema": {
+       "$ref": "#/definitions/GenericPublicError"
+      }
      }
     },
     "summary": "Get a notification template.",
@@ -6279,9 +6286,9 @@
       }
      },
      "400": {
-      "description": "ValidationError",
+      "description": "GenericPublicError",
       "schema": {
-       "$ref": "#/definitions/ValidationError"
+       "$ref": "#/definitions/GenericPublicError"
       }
      },
      "409": {