NGAlert: Remove unwanted fields from notification channel config (#34036)

Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>

pkg/tests/api/alerting/api_alertmanager_configuration_test.go

@@ -49,7 +49,6 @@ func TestAlertmanagerConfigurationIsTransactional(t *testing.T) {
 				},
 				"secureSettings": {},
 				"type": "slack",
-				"sendReminder": true,
 				"name": "slack.receiver",
 				"disableResolveMessage": false,
 				"uid": ""
@@ -96,7 +95,6 @@ func TestAlertmanagerConfigurationPersistSecrets(t *testing.T) {
 					"url": "http://averysecureurl.com/webhook"
 				},
 				"type": "slack",
-				"sendReminder": true,
 				"name": "slack.receiver",
 				"disableResolveMessage": false
 			}]
@@ -127,7 +125,6 @@ func TestAlertmanagerConfigurationPersistSecrets(t *testing.T) {
 					"url": true
 				},
 				"type": "slack",
-				"sendReminder": true,
 				"name": "slack.receiver",
 				"disableResolveMessage": false
 			}]
@@ -153,16 +150,10 @@ func TestAlertmanagerConfigurationPersistSecrets(t *testing.T) {
 		"receivers": [{
 			"name": "slack.receiver",
 			"grafana_managed_receiver_configs": [{
-				"id": 0,
 				"uid": "",
 				"name": "slack.receiver",
 				"type": "slack",
-				"isDefault": false,
-				"sendReminder": true,
 				"disableResolveMessage": false,
-				"frequency": "",
-				"created": "0001-01-01T00:00:00Z",
-				"updated": "0001-01-01T00:00:00Z",
 				"settings": {
 					"recipient": "#unified-alerting-test-but-updated"
 				},