avoid too much auditing during decom/rebalance make it more robust (#19174)

there can be a sudden spike in tiny allocations,
due to too much auditing being done, also don't hang
on the

```
h.logCh <- entry
```

after initializing workers if you do not have a way to
dequeue for some reason.

docs/debugging/pprofgoparser/main.go

@@ -41,7 +41,6 @@ var (
 )
 
 func init() {
-
 	flag.DurationVar(&less, "less", 0, "goroutine waiting less than the specified time")
 	flag.DurationVar(&goTime, "time", 0, "goroutine waiting for exactly the specified time")
 	flag.DurationVar(&margin, "margin", 0, "margin time")