fix(service ping): improve systemID search query to use index (#10566)

# Which Problems Are Solved

We noticed that the startup for v4 was way slower than v3. A query
without an instanceID filter could be traced back to the systemID query
of the service ping.

# How the Problems Are Solved

A an empty instanceID to the query to ensure it used an appropriate
index.

# Additional Changes

None

# Additional Context

- Closes https://github.com/zitadel/zitadel/issues/10390
- backport to v4.x

internal/serviceping/worker.go

@@ -207,6 +207,7 @@ func (s *systemIDReducer) AppendEvents(events ...eventstore.Event) {
 
 func (s *systemIDReducer) Query() *eventstore.SearchQueryBuilder {
 	return eventstore.NewSearchQueryBuilder(eventstore.ColumnsEvent).
+		InstanceID(""). // to make sure we can use an appropriate index
 		AddQuery().
 		AggregateTypes(system.AggregateType).
 		EventTypes(system.IDGeneratedType).