ChannelStore migration Part 2 (#15405)

* Migration completed

* Several corrections in tests

* Fix imports

* Fix some errors after testing

* Trigger CI

* Fix tests

* Suggestions

* Suggestions

* Add license

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/user.go

@@ -1514,7 +1514,7 @@ func (a *App) PermanentDeleteUser(user *model.User) *model.AppError {
 	}
 
 	if err := a.Srv().Store.Channel().PermanentDeleteMembersByUser(user.Id); err != nil {
-		return err
+		return model.NewAppError("PermanentDeleteUser", "app.channel.permanent_delete_members_by_user.app_error", nil, err.Error(), http.StatusInternalServerError)
 	}
 
 	if err := a.Srv().Store.Group().PermanentDeleteMembersByUser(user.Id); err != nil {
@@ -2028,7 +2028,7 @@ func (a *App) GetViewUsersRestrictions(userId string) (*model.ViewUsersRestricti
 
 	userChannelMembers, err := a.Srv().Store.Channel().GetAllChannelMembersForUser(userId, true, true)
 	if err != nil {
-		return nil, err
+		return nil, model.NewAppError("GetViewUsersRestrictions", "app.channel.get_channels.get.app_error", nil, err.Error(), http.StatusInternalServerError)
 	}
 
 	channelIds := []string{}