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

We add the necessary store methods to use GraphQL

```release-note
NONE
```

store/searchlayer/file_info_layer.go

@@ -160,7 +160,10 @@ func (s SearchFileInfoStore) PermanentDeleteByUser(userId string) (int64, error)
 func (s SearchFileInfoStore) Search(paramsList []*model.SearchParams, userId, teamId string, page, perPage int) (*model.FileInfoList, error) {
 	for _, engine := range s.rootStore.searchEngine.GetActiveEngines() {
 		if engine.IsSearchEnabled() {
-			userChannels, nErr := s.rootStore.Channel().GetChannels(teamId, userId, paramsList[0].IncludeDeletedChannels, 0)
+			userChannels, nErr := s.rootStore.Channel().GetChannels(teamId, userId, &model.ChannelSearchOpts{
+				IncludeDeleted: paramsList[0].IncludeDeletedChannels,
+				LastDeleteAt:   0,
+			})
 			if nErr != nil {
 				return nil, nErr
 			}

store/searchlayer/post_layer.go

@@ -142,7 +142,11 @@ func (s SearchPostStore) searchPostsForUserByEngine(engine searchengine.SearchEn
 	}
 
 	// We only allow the user to search in channels they are a member of.
-	userChannels, err2 := s.rootStore.Channel().GetChannels(teamId, userId, paramsList[0].IncludeDeletedChannels, 0)
+	userChannels, err2 := s.rootStore.Channel().GetChannels(teamId, userId,
+		&model.ChannelSearchOpts{
+			IncludeDeleted: paramsList[0].IncludeDeletedChannels,
+			LastDeleteAt:   0,
+		})
 	if err2 != nil {
 		return nil, errors.Wrap(err2, "error getting channel for user")
 	}