Agniva De Sarker d1b164ab1f Improve session cleanup (#18123) ...

- We move logging statements to the upper layer.
Store functions are low-level methods and should return error
upwards rather than logging.
- Used IN instead of any (array ()) which is equivalent.
- Made the delay to be of type time.Duration and un-exported it.
- Unexported the batch size constant.

```release-note
NONE
```

2021-08-13 20:15:24 +05:30

..

timerlayer.go

Improve session cleanup (#18123)

2021-08-13 20:15:24 +05:30