MM-48651: Log error while queuing telemetry (#21821)

We didn't use to handle the error returned from the Enqueue
method. We fix that.

Additionally, we add a verbosity flag that can allow us to
look into verbose logs from the rudder client. This can
help us to debug issues regarding telemetry not being sent.

https://mattermost.atlassian.net/browse/MM-48651

```release-note
NONE
```

model/config.go

@@ -1235,6 +1235,7 @@ type LogSettings struct {
 	FileLocation           *string `access:"environment_logging,write_restrictable,cloud_restrictable"`
 	EnableWebhookDebugging *bool   `access:"environment_logging,write_restrictable,cloud_restrictable"`
 	EnableDiagnostics      *bool   `access:"environment_logging,write_restrictable,cloud_restrictable"` // telemetry: none
+	VerboseDiagnostics     *bool   `access:"environment_logging,write_restrictable,cloud_restrictable"` // telemetry: none
 	EnableSentry           *bool   `access:"environment_logging,write_restrictable,cloud_restrictable"` // telemetry: none
 	AdvancedLoggingConfig  *string `access:"environment_logging,write_restrictable,cloud_restrictable"`
 }
@@ -1278,6 +1279,10 @@ func (s *LogSettings) SetDefaults() {
 		s.EnableDiagnostics = NewBool(true)
 	}
 
+	if s.VerboseDiagnostics == nil {
+		s.VerboseDiagnostics = NewBool(false)
+	}
+
 	if s.EnableSentry == nil {
 		s.EnableSentry = NewBool(*s.EnableDiagnostics)
 	}