Query cf local instance according to the result of cvd_status

- find host tools(cvd_status/stop_cvd) from the path recorded in cuttlefish_config.json
- Refactor delete function for local instances.

Bug: 144738758
Test: acloud-dev list
Change-Id: Ied5b99fa12637948a8529aa9010fdbb0d1964efe
16 files changed