Alerting: Modify endpoint for testing a datasource rule using the UID (#48070)

* Modify testing endpoint to expect the datasource UID

* Update docs

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

@@ -1937,7 +1937,7 @@
         }
       }
     },
-    "/api/v1/rule/test/{DatasourceID}": {
+    "/api/v1/rule/test/{DatasourceUID}": {
       "post": {
         "description": "Test a rule against external data source ruler",
         "consumes": [
@@ -1952,10 +1952,9 @@
         "operationId": "RouteTestRuleConfig",
         "parameters": [
           {
-            "type": "integer",
-            "format": "int64",
-            "description": "DatasourceID should be the numeric datasource identifier",
-            "name": "DatasourceID",
+            "type": "string",
+            "description": "DatasoureUID should be the datasource UID identifier",
+            "name": "DatasourceUID",
             "in": "path",
             "required": true
           },
@@ -5375,11 +5374,12 @@
       "$ref": "#/definitions/gettableSilence"
     },
     "gettableSilences": {
-      "description": "GettableSilences gettable silences",
       "type": "array",
       "items": {
         "$ref": "#/definitions/gettableSilence"
       },
+      "x-go-name": "GettableSilences",
+      "x-go-package": "github.com/prometheus/alertmanager/api/v2/models",
       "$ref": "#/definitions/gettableSilences"
     },
     "labelSet": {
@@ -5554,6 +5554,7 @@
       "$ref": "#/definitions/postableSilence"
     },
     "receiver": {
+      "description": "Receiver receiver",
       "type": "object",
       "required": [
         "name"
@@ -5565,8 +5566,6 @@
           "x-go-name": "Name"
         }
       },
-      "x-go-name": "Receiver",
-      "x-go-package": "github.com/prometheus/alertmanager/api/v2/models",
       "$ref": "#/definitions/receiver"
     },
     "silence": {