watcher need support watcher-service delete

Registered by Min Li

Currently, watcher service list can list all services like:
| 809 | watcher-applier | watcher-applier-7c67f7f9fb-q8trg | FAILED |
| 812 | watcher-decision-engine | watcher-decision-engine-864f595469-gpljc | FAILED |
| 815 | watcher-applier | watcher-applier-5f7459976-xm5h8 | FAILED |
| 818 | watcher-decision-engine | watcher-decision-engine-6d7d59d444-9chzv | ACTIVE |
| 821 | watcher-applier | watcher-applier-5d977c759f-zwrll | ACTIVE |
+-----+-------------------------+------------------------------------------+--------+
It will be able to see both the service state is ACTIVE and
the service state is FAILED, in fact these FAILED services are no longer used. This will cause the user to trouble.
Therefore, we maybe need to provide a command that can delete the service that is not used.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Min Li
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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