GraphQL (part 1): Store layer (#19465)

We add the necessary store methods to use GraphQL

```release-note
NONE
```

app/team.go

@@ -1116,7 +1116,10 @@ func (a *App) LeaveTeam(c *request.Context, team *model.Team, user *model.User,
 
 	var channelList model.ChannelList
 	var nErr error
-	if channelList, nErr = a.Srv().Store.Channel().GetChannels(team.Id, user.Id, true, 0); nErr != nil {
+	if channelList, nErr = a.Srv().Store.Channel().GetChannels(team.Id, user.Id, &model.ChannelSearchOpts{
+		IncludeDeleted: true,
+		LastDeleteAt:   0,
+	}); nErr != nil {
 		var nfErr *store.ErrNotFound
 		if errors.As(nErr, &nfErr) {
 			channelList = model.ChannelList{}