fix: cleanup information in logs (#10634)

# Which Problems Are Solved

I noticed some outdated / misleading logs when starting zitadel:
- The `init-projections` were no longer in beta for a long time.
- The LRU auth request cache is disabled by default, which results in
the following message, which has caused confusion by customers:
```level=info msg="auth request cache disabled" error="must provide a positive size"```

# How the Problems Are Solved

- Removed the beta info
- Disable cache initialization if possible

# Additional Changes

None

# Additional Context

- noticed internally
- backport to v4.x

cmd/setup/setup.go

@@ -571,8 +571,6 @@ func initProjections(
 	ctx context.Context,
 	eventstoreClient *eventstore.Eventstore,
 ) error {
-	logging.Info("init-projections is currently in beta")
-
 	for _, p := range projection.Projections() {
 		if err := migration.Migrate(ctx, eventstoreClient, p); err != nil {
 			logging.WithFields("name", p.String()).OnError(err).Error("projection migration failed")

internal/auth_request/repository/cache/cache.go

@@ -27,6 +27,9 @@ func Start(dbClient *database.DB, amountOfCachedAuthRequests uint16) *AuthReques
 	cache := &AuthRequestCache{
 		client: dbClient,
 	}
+	if amountOfCachedAuthRequests == 0 {
+		return cache
+	}
 	idCache, err := lru.New[string, *domain.AuthRequest](int(amountOfCachedAuthRequests))
 	logging.OnError(err).Info("auth request cache disabled")
 	if err == nil {