[Feature] support pod crash debug

[intelligentfu]

when a pod of doris crashes and does not restart successfully, we should exec the pod for manual debugging.
when a pod crashes, we can add an annotation selectdb.com.doris/runmode=debug, the next start of the pod should run in debug mode. The pod will re-enter running status in the next restart. when you have finished debugging the service, you can delete the pod or cancel the annotation, the pod will run in normal mode at the next start.

[intelligentfu]

#42