[CLNP-6874] No mark as delivered if disableMarkAsDelivered is set to true (#1340)

[fix]: No mark as delivered if `disableMarkAsDelivered` is set to `true`

Fixes [CLNP-6874](https://sendbird.atlassian.net/browse/CLNP-6874)

### Changelogs

- Fixed a bug that channel is marked as delivered with
`disableMarkAsDelivered` set to `true`

### Checklist

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- [x] **All tests pass locally with my changes**
- [ ] **I have added tests that prove my fix is effective or that my
feature works**
- [ ] **Public components / utils / props are appropriately exported**
- [ ] I have added necessary documentation (if appropriate)


[CLNP-6874]:
https://sendbird.atlassian.net/browse/CLNP-6874?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Author: chrisallo

src/modules/GroupChannelList/context/GroupChannelListProvider.tsx

@@ -120,7 +120,11 @@ export const GroupChannelListManager: React.FC<GroupChannelListProviderProps> =
 
   const channelListDataSource = useGroupChannelListDataSource(sdk, {
     collectionCreator: getCollectionCreator(sdk, channelListQueryParams),
-    markAsDelivered: (channels) => channels.forEach(scheduler.push),
+    markAsDelivered: (channels) => {
+      if (!config.disableMarkAsDelivered) {
+        channels.forEach(scheduler.push);
+      }
+    },
     onChannelsDeleted: (channelUrls) => {
       channelUrls.forEach((url) => {
         if (url === selectedChannelUrl) onChannelSelect(null);