* fix chaos checker
Signed-off-by: NThreadDao <yufen.zong@zilliz.com>

* add chaos queryNode pod failure
Signed-off-by: NThreadDao <yufen.zong@zilliz.com>

* add datanode pod failure chaos experiment

add export pods logs func
Signed-off-by: NThreadDao <yufen.zong@zilliz.com>