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

We add the necessary store methods to use GraphQL

```release-note
NONE
```

api4/channel.go

@@ -885,7 +885,10 @@ func getChannelsForTeamForUser(c *Context, w http.ResponseWriter, r *http.Reques
 		return
 	}
 
-	channels, err := c.App.GetChannelsForTeamForUser(c.Params.TeamId, c.Params.UserId, c.Params.IncludeDeleted, lastDeleteAt)
+	channels, err := c.App.GetChannelsForTeamForUser(c.Params.TeamId, c.Params.UserId, &model.ChannelSearchOpts{
+		IncludeDeleted: c.Params.IncludeDeleted,
+		LastDeleteAt:   lastDeleteAt,
+	})
 	if err != nil {
 		c.Err = err
 		return

api4/channel_category.go

@@ -210,7 +210,10 @@ func updateCategoriesForTeamForUser(c *Context, w http.ResponseWriter, r *http.R
 }
 
 func validateSidebarCategory(c *Context, teamId, userId string, category *model.SidebarCategoryWithChannels) *model.AppError {
-	channels, err := c.App.GetChannelsForTeamForUser(teamId, userId, true, 0)
+	channels, err := c.App.GetChannelsForTeamForUser(teamId, userId, &model.ChannelSearchOpts{
+		IncludeDeleted: true,
+		LastDeleteAt:   0,
+	})
 	if err != nil {
 		return model.NewAppError("validateSidebarCategory", "api.invalid_channel", nil, err.Error(), http.StatusBadRequest)
 	}
@@ -221,7 +224,10 @@ func validateSidebarCategory(c *Context, teamId, userId string, category *model.
 }
 
 func validateSidebarCategories(c *Context, teamId, userId string, categories []*model.SidebarCategoryWithChannels) *model.AppError {
-	channels, err := c.App.GetChannelsForTeamForUser(teamId, userId, true, 0)
+	channels, err := c.App.GetChannelsForTeamForUser(teamId, userId, &model.ChannelSearchOpts{
+		IncludeDeleted: true,
+		LastDeleteAt:   0,
+	})
 	if err != nil {
 		return model.NewAppError("validateSidebarCategory", "api.invalid_channel", nil, err.Error(), http.StatusBadRequest)
 	}