OSF: Used model.NewPointer everywhere (#27838)

```release-note
NONE
```

server/channels/app/webhook_test.go

@@ -397,19 +397,19 @@ func TestCreateWebhookPostWithPriority(t *testing.T) {
 
 	testConditions := []model.PostPriority{
 		{
-			Priority:                model.NewString("high"),
-			RequestedAck:            model.NewBool(true),
-			PersistentNotifications: model.NewBool(false),
+			Priority:                model.NewPointer("high"),
+			RequestedAck:            model.NewPointer(true),
+			PersistentNotifications: model.NewPointer(false),
 		},
 		{
-			Priority:                model.NewString(""),
-			RequestedAck:            model.NewBool(true),
-			PersistentNotifications: model.NewBool(false),
+			Priority:                model.NewPointer(""),
+			RequestedAck:            model.NewPointer(true),
+			PersistentNotifications: model.NewPointer(false),
 		},
 		{
-			Priority:                model.NewString("urgent"),
-			RequestedAck:            model.NewBool(false),
-			PersistentNotifications: model.NewBool(true),
+			Priority:                model.NewPointer("urgent"),
+			RequestedAck:            model.NewPointer(false),
+			PersistentNotifications: model.NewPointer(true),
 		},
 	}
 
@@ -917,7 +917,7 @@ func TestDoOutgoingWebhookRequest(t *testing.T) {
 	defer th.TearDown()
 
 	th.App.UpdateConfig(func(cfg *model.Config) {
-		cfg.ServiceSettings.AllowedUntrustedInternalConnections = model.NewString("127.0.0.1")
+		cfg.ServiceSettings.AllowedUntrustedInternalConnections = model.NewPointer("127.0.0.1")
 		*cfg.ServiceSettings.EnableOutgoingWebhooks = true
 	})
 
@@ -979,7 +979,7 @@ func TestDoOutgoingWebhookRequest(t *testing.T) {
 		defer close(releaseHandler)
 
 		th.App.UpdateConfig(func(cfg *model.Config) {
-			cfg.ServiceSettings.OutgoingIntegrationRequestsTimeout = model.NewInt64(1)
+			cfg.ServiceSettings.OutgoingIntegrationRequestsTimeout = model.NewPointer(int64(1))
 		})
 
 		_, err := th.App.doOutgoingWebhookRequest(server.URL, strings.NewReader(""), "application/json", nil)
@@ -996,7 +996,7 @@ func TestDoOutgoingWebhookRequest(t *testing.T) {
 		defer server.Close()
 
 		th.App.UpdateConfig(func(cfg *model.Config) {
-			cfg.ServiceSettings.OutgoingIntegrationRequestsTimeout = model.NewInt64(2)
+			cfg.ServiceSettings.OutgoingIntegrationRequestsTimeout = model.NewPointer(int64(2))
 		})
 
 		resp, err := th.App.doOutgoingWebhookRequest(server.URL, strings.NewReader(""), "application/json", nil)