Transition agent operations to some "lost" state when the agent is removed.

MESOS-8782 and MESOS-8783 transition operations to OPERATION_GONE_BY_OPERATOR or OPERATION_UNREACHABLE when their agents are marked as gone or unreachable respectively. However, there are other cases where agents can be "removed" and forgot by the master:
1) When an agent tries to register with a new ID from the same IP:
https://github.com/apache/mesos/blob/f130544bdb8a9849096ee2cb35ebcbc7d8a326d8/src/master/master.cpp#L6836-L6849
2) When an agent requests to unregister:
https://github.com/apache/mesos/blob/f130544bdb8a9849096ee2cb35ebcbc7d8a326d8/src/master/master.cpp#L7817-L7840

In these tasks, the master explicitly sends TASK_LOST for task status updates (this also means that this documentation is wrong), but does nothing for operations. We should design proper operation status transitions for these cases.