In a longevity test reported in scylladb/scylladb#16668 we observed that
NORMAL state is not being properly handled for a node that replaced
another node. Either handle_state_normal is not being called, or it is
but getting stuck in the middle. Which is the case couldn't be
determined from the logs, and attempts at creating a local reproducer
failed.
Thus the plan is to continue debugging using the longevity test, but we need
more logs. To check whether `handle_state_normal` was called and which branches
were taken, include some INFO level logs there. Also, detect deadlocks inside
`gossiper::lock_endpoint` by reporting an error message if `lock_endpoint`
waits for the lock for too long.
Ref: scylladb/scylladb#16668Closesscylladb/scylladb#16733
* github.com:scylladb/scylladb:
gossiper: report error when waiting too long for endpoint lock
gossiper: store source_location instead of string in endpoint_permit
storage_service: more verbose logging in handle_state_normal
5f44ae8371