Agniva De Sarker d1de4857aa MM-43145: channels loader (#19957) ...

Add channels dataloader

https://mattermost.atlassian.net/browse/MM-43145

```release-note
NONE
```

2022-04-11 13:41:09 +05:30

..

timerlayer.go

MM-43145: channels loader (#19957)

2022-04-11 13:41:09 +05:30