[telemetry][ColorPicker] add event name support (#10476)

Allow to set a custom name for the event instead of just using the
class name.

src/common/ManagedTelemetry/Telemetry/PowerToysTelemetry.cs

@@ -37,7 +37,7 @@ namespace Microsoft.PowerToys.Telemetry
             where T : EventBase, IEvent
         {
             this.Write<T>(
-                null,
+                telemetryEvent.EventName,
                 new EventSourceOptions()
                 {
                     Keywords = ProjectKeywordMeasure,