PLT-7567: Integration of Team Icons (#8284)

* PLT-7567: Integration of Team Icons

* PLT-7567: Read replica workaround, upgrade logic moved, more concrete i18n key

* PLT-7567: Read replica workaround, corrections

* PLT-7567: upgrade correction

store/store.go

@@ -103,6 +103,7 @@ type TeamStore interface {
 	RemoveMember(teamId string, userId string) StoreChannel
 	RemoveAllMembersByTeam(teamId string) StoreChannel
 	RemoveAllMembersByUser(userId string) StoreChannel
+	UpdateLastTeamIconUpdate(teamId string, curTime int64) StoreChannel
 }
 
 type ChannelStore interface {