refactor(handler): cache active instances (#9008)

# Which Problems Are Solved

Scheduled handlers use `eventstore.InstanceIDs` to get the all active
instances within a given timeframe. This function scrapes through all
events written within that time frame which can cause heavy load on the
database.

# How the Problems Are Solved

A new query cache `activeInstances` is introduced which caches the ids
of all instances queried by id or host within the configured timeframe.

# Additional Changes

- Changed `default.yaml`
  - Removed `HandleActiveInstances` from custom handler configs
- Added `MaxActiveInstances` to define the maximal amount of cached
instance ids
- fixed start-from-init and start-from-setup to start auth and admin
projections twice
- fixed org cache invalidation to use correct index

# Additional Context

- part of #8999

internal/query/org.go

@@ -517,6 +517,6 @@ func (o *Org) Keys(index orgIndex) []string {
 }
 
 func (c *Caches) registerOrgInvalidation() {
-	invalidate := cacheInvalidationFunc(c.instance, instanceIndexByID, getAggregateID)
+	invalidate := cacheInvalidationFunc(c.org, orgIndexByID, getAggregateID)
 	projection.OrgProjection.RegisterCacheInvalidation(invalidate)
 }