Alerting: Empty endpoint to load alertmanager config with mimirtool (#106266)

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

@@ -576,6 +576,14 @@
    },
    "type": "object"
   },
+  "AlertmanagerUserConfig": {
+   "properties": {
+    "alertmanager_config": {
+     "$ref": "#/definitions/Config"
+    }
+   },
+   "type": "object"
+  },
   "ApiRuleNode": {
    "properties": {
     "alert": {
@@ -3666,7 +3674,6 @@
    "type": "object"
   },
   "Route": {
-   "description": "A Route is a node that contains definitions of how to handle alerts. This is modified\nfrom the upstream alertmanager in that it adds the ObjectMatchers property.",
    "properties": {
     "active_time_intervals": {
      "items": {
@@ -3708,12 +3715,6 @@
      },
      "type": "array"
     },
-    "object_matchers": {
-     "$ref": "#/definitions/ObjectMatchers"
-    },
-    "provenance": {
-     "$ref": "#/definitions/Provenance"
-    },
     "receiver": {
      "type": "string"
     },
@@ -3727,6 +3728,7 @@
      "type": "array"
     }
    },
+   "title": "A Route is a node that contains definitions of how to handle alerts.",
    "type": "object"
   },
   "RouteExport": {